/wordpress/wp-includes/query.php

<?php

/**

 * WordPress Query API

 *

 * The query API attempts to get which part of WordPress to the user is on. It

 * also provides functionality to getting URL query information.

 *

 * @link http://codex.wordpress.org/The_Loop More information on The Loop.

 *

 * @package WordPress

 * @subpackage Query

 */



/**

 * Retrieve variable in the WP_Query class.

 *

 * @see WP_Query::get()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param string $var The variable key to retrieve.

 * @return mixed

 */

function get_query_var($var) {

	global $wp_query;



	return $wp_query->get($var);

}





/**

 * Retrieve the currently-queried object.  Wrapper for $wp_query->get_queried_object()

 *

 * @uses WP_Query::get_queried_object

 *

 * @since 3.1.0

 * @access public

 *

 * @return object

 */

function get_queried_object() {

	global $wp_query;

	return $wp_query->get_queried_object();

}



/**

 * Retrieve ID of the current queried object. Wrapper for $wp_query->get_queried_object_id()

 *

 * @uses WP_Query::get_queried_object_id()

 *

 * @since 3.1.0

 * @access public

 *

 * @return int

 */

function get_queried_object_id() {

	global $wp_query;

	return $wp_query->get_queried_object_id();

}



/**

 * Set query variable.

 *

 * @see WP_Query::set()

 * @since 2.2.0

 * @uses $wp_query

 *

 * @param string $var Query variable key.

 * @param mixed $value

 * @return null

 */

function set_query_var($var, $value) {

	global $wp_query;



	return $wp_query->set($var, $value);

}



/**

 * Set up The Loop with query parameters.

 *

 * This will override the current WordPress Loop and shouldn't be used more than

 * once. This must not be used within the WordPress Loop.

 *

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param string $query

 * @return array List of posts

 */

function &query_posts($query) {

	unset($GLOBALS['wp_query']);

	$GLOBALS['wp_query'] =& new WP_Query();

	return $GLOBALS['wp_query']->query($query);

}



/**

 * Destroy the previous query and set up a new query.

 *

 * This should be used after {@link query_posts()} and before another {@link

 * query_posts()}. This will remove obscure bugs that occur when the previous

 * wp_query object is not destroyed properly before another is set up.

 *

 * @since 2.3.0

 * @uses $wp_query

 */

function wp_reset_query() {

	unset($GLOBALS['wp_query']);

	$GLOBALS['wp_query'] =& $GLOBALS['wp_the_query'];

	wp_reset_postdata();

}



/**

 * After looping through a separate query, this function restores

 * the $post global to the current post in the main query

 *

 * @since 3.0.0

 * @uses $wp_query

 */

function wp_reset_postdata() {

	global $wp_query;

	if ( !empty($wp_query->post) ) {

		$GLOBALS['post'] = $wp_query->post;

		setup_postdata($wp_query->post);

	}

}



/*

 * Query type checks.

 */



/**

 * Is the query for an archive page?

 *

 * Month, Year, Category, Author, Post Type archive...

 *

 * @see WP_Query::is_archive()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_archive() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_archive();

}



/**

 * Is the query for a post type archive page?

 *

 * @see WP_Query::is_post_type_archive()

 * @since 3.1.0

 * @uses $wp_query

 *

 * @param mixed $post_types Optional. Post type or array of posts types to check against.

 * @return bool

 */

function is_post_type_archive( $post_types = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_post_type_archive( $post_types );

}



/**

 * Is the query for an attachment page?

 *

 * @see WP_Query::is_attachment()

 * @since 2.0.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_attachment() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_attachment();

}



/**

 * Is the query for an author archive page?

 *

 * If the $author parameter is specified, this function will additionally

 * check if the query is for one of the authors specified.

 *

 * @see WP_Query::is_author()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param mixed $author Optional. User ID, nickname, nicename, or array of User IDs, nicknames, and nicenames

 * @return bool

 */

function is_author( $author = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_author( $author );

}



/**

 * Is the query for a category archive page?

 *

 * If the $category parameter is specified, this function will additionally

 * check if the query is for one of the categories specified.

 *

 * @see WP_Query::is_category()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param mixed $category Optional. Category ID, name, slug, or array of Category IDs, names, and slugs.

 * @return bool

 */

function is_category( $category = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_category( $category );

}



/**

 * Is the query for a tag archive page?

 *

 * If the $tag parameter is specified, this function will additionally

 * check if the query is for one of the tags specified.

 *

 * @see WP_Query::is_tag()

 * @since 2.3.0

 * @uses $wp_query

 *

 * @param mixed $slug Optional. Tag slug or array of slugs.

 * @return bool

 */

function is_tag( $slug = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_tag( $slug );

}



/**

 * Is the query for a taxonomy archive page?

 *

 * If the $taxonomy parameter is specified, this function will additionally

 * check if the query is for that specific $taxonomy.

 *

 * If the $term parameter is specified in addition to the $taxonomy parameter,

 * this function will additionally check if the query is for one of the terms

 * specified.

 *

 * @see WP_Query::is_tax()

 * @since 2.5.0

 * @uses $wp_query

 *

 * @param mixed $taxonomy Optional. Taxonomy slug or slugs.

 * @param mixed $term Optional. Term ID, name, slug or array of Term IDs, names, and slugs.

 * @return bool

 */

function is_tax( $taxonomy = '', $term = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_tax( $taxonomy, $term );

}



/**

 * Whether the current URL is within the comments popup window.

 *

 * @see WP_Query::is_comments_popup()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_comments_popup() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_comments_popup();

}



/**

 * Is the query for a date archive?

 *

 * @see WP_Query::is_date()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_date() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_date();

}



/**

 * Is the query for a day archive?

 *

 * @see WP_Query::is_day()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_day() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_day();

}



/**

 * Is the query for a feed?

 *

 * @see WP_Query::is_feed()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param string|array $feeds Optional feed types to check.

 * @return bool

 */

function is_feed( $feeds = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_feed( $feeds );

}



/**

 * Is the query for a comments feed?

 *

 * @see WP_Query::is_comments_feed()

 * @since 3.0.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_comment_feed() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_comment_feed();

}



/**

 * Is the query for the front page of the site?

 *

 * This is for what is displayed at your site's main URL.

 *

 * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_on_front'.

 *

 * If you set a static page for the front page of your site, this function will return

 * true when viewing that page.

 *

 * Otherwise the same as @see is_home()

 *

 * @see WP_Query::is_front_page()

 * @since 2.5.0

 * @uses is_home()

 * @uses get_option()

 *

 * @return bool True, if front of site.

 */

function is_front_page() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_front_page();

}



/**

 * Is the query for the blog homepage?

 *

 * This is the page which shows the time based blog content of your site.

 *

 * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_for_posts'.

 *

 * If you set a static page for the front page of your site, this function will return

 * true only on the page you set as the "Posts page".

 *

 * @see is_front_page()

 *

 * @see WP_Query::is_home()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool True if blog view homepage.

 */

function is_home() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_home();

}



/**

 * Is the query for a month archive?

 *

 * @see WP_Query::is_month()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_month() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_month();

}



/**

 * Is the query for a single page?

 *

 * If the $page parameter is specified, this function will additionally

 * check if the query is for one of the pages specified.

 *

 * @see is_single()

 * @see is_singular()

 *

 * @see WP_Query::is_page()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param mixed $page Page ID, title, slug, or array of such.

 * @return bool

 */

function is_page( $page = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_page( $page );

}



/**

 * Is the query for paged result and not for the first page?

 *

 * @see WP_Query::is_paged()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_paged() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_paged();

}



/**

 * Is the query for a post or page preview?

 *

 * @see WP_Query::is_preview()

 * @since 2.0.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_preview() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_preview();

}



/**

 * Is the query for the robots file?

 *

 * @see WP_Query::is_robots()

 * @since 2.1.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_robots() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_robots();

}



/**

 * Is the query for a search?

 *

 * @see WP_Query::is_search()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_search() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_search();

}



/**

 * Is the query for a single post?

 *

 * Works for any post type, except attachments and pages

 *

 * If the $post parameter is specified, this function will additionally

 * check if the query is for one of the Posts specified.

 *

 * @see is_page()

 * @see is_singular()

 *

 * @see WP_Query::is_single()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param mixed $post Post ID, title, slug, or array of such.

 * @return bool

 */

function is_single( $post = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_single( $post );

}



/**

 * Is the query for a single post of any post type (post, attachment, page, ... )?

 *

 * If the $post_types parameter is specified, this function will additionally

 * check if the query is for one of the Posts Types specified.

 *

 * @see is_page()

 * @see is_single()

 *

 * @see WP_Query::is_singular()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @param mixed $post_types Optional. Post Type or array of Post Types

 * @return bool

 */

function is_singular( $post_types = '' ) {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_singular( $post_types );

}



/**

 * Is the query for a specific time?

 *

 * @see WP_Query::is_time()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_time() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_time();

}



/**

 * Is the query for a trackback endpoint call?

 *

 * @see WP_Query::is_trackback()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_trackback() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_trackback();

}



/**

 * Is the query for a specific year?

 *

 * @see WP_Query::is_year()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_year() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_year();

}



/**

 * Is the query a 404 (returns no results)?

 *

 * @see WP_Query::is_404()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function is_404() {

	global $wp_query;



	if ( ! isset( $wp_query ) ) {

		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );

		return false;

	}



	return $wp_query->is_404();

}



/*

 * The Loop.  Post loop control.

 */



/**

 * Whether current WordPress query has results to loop over.

 *

 * @see WP_Query::have_posts()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return bool

 */

function have_posts() {

	global $wp_query;



	return $wp_query->have_posts();

}



/**

 * Whether the caller is in the Loop.

 *

 * @since 2.0.0

 * @uses $wp_query

 *

 * @return bool True if caller is within loop, false if loop hasn't started or ended.

 */

function in_the_loop() {

	global $wp_query;



	return $wp_query->in_the_loop;

}



/**

 * Rewind the loop posts.

 *

 * @see WP_Query::rewind_posts()

 * @since 1.5.0

 * @uses $wp_query

 *

 * @return null

 */

function rewind_posts() {

	global $wp_query;



	return $wp_query->rewind_posts();

}



/**

 * Iterate the post index in the loop.

 *

 * @see WP_Query::the_post()

 * @since 1.5.0

 * @uses $wp_query

 */

function the_post() {

	global $wp_query;



	$wp_query->the_post();

}



/*

 * Comments loop.

 */



/**

 * Whether there are comments to loop over.

 *

 * @see WP_Query::have_comments()

 * @since 2.2.0

 * @uses $wp_query

 *

 * @return bool

 */

function have_comments() {

	global $wp_query;

	return $wp_query->have_comments();

}



/**

 * Iterate comment index in the comment loop.

 *

 * @see WP_Query::the_comment()

 * @since 2.2.0

 * @uses $wp_query

 *

 * @return object

 */

function the_comment() {

	global $wp_query;

	return $wp_query->the_comment();

}



/*

 * WP_Query

 */



/**

 * The WordPress Query class.

 *

 * @link http://codex.wordpress.org/Function_Reference/WP_Query Codex page.

 *

 * @since 1.5.0

 */

class WP_Query {



	/**

	 * Query vars set by the user

	 *

	 * @since 1.5.0

	 * @access public

	 * @var array

	 */

	var $query;



	/**

	 * Query vars, after parsing

	 *

	 * @since 1.5.0

	 * @access public

	 * @var array

	 */

	var $query_vars = array();



	/**

	 * Taxonomy query, as passed to get_tax_sql()

	 *

	 * @since 3.1.0

	 * @access public

	 * @var object WP_Tax_Query

	 */

	var $tax_query;



	/**

	 * Holds the data for a single object that is queried.

	 *

	 * Holds the contents of a post, page, category, attachment.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var object|array

	 */

	var $queried_object;



	/**

	 * The ID of the queried object.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var int

	 */

	var $queried_object_id;



	/**

	 * Get post database query.

	 *

	 * @since 2.0.1

	 * @access public

	 * @var string

	 */

	var $request;



	/**

	 * List of posts.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var array

	 */

	var $posts;



	/**

	 * The amount of posts for the current query.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var int

	 */

	var $post_count = 0;



	/**

	 * Index of the current item in the loop.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var int

	 */

	var $current_post = -1;



	/**

	 * Whether the loop has started and the caller is in the loop.

	 *

	 * @since 2.0.0

	 * @access public

	 * @var bool

	 */

	var $in_the_loop = false;



	/**

	 * The current post ID.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var object

	 */

	var $post;



	/**

	 * The list of comments for current post.

	 *

	 * @since 2.2.0

	 * @access public

	 * @var array

	 */

	var $comments;



	/**

	 * The amount of comments for the posts.

	 *

	 * @since 2.2.0

	 * @access public

	 * @var int

	 */

	var $comment_count = 0;



	/**

	 * The index of the comment in the comment loop.

	 *

	 * @since 2.2.0

	 * @access public

	 * @var int

	 */

	var $current_comment = -1;



	/**

	 * Current comment ID.

	 *

	 * @since 2.2.0

	 * @access public

	 * @var int

	 */

	var $comment;



	/**

	 * Amount of posts if limit clause was not used.

	 *

	 * @since 2.1.0

	 * @access public

	 * @var int

	 */

	var $found_posts = 0;



	/**

	 * The amount of pages.

	 *

	 * @since 2.1.0

	 * @access public

	 * @var int

	 */

	var $max_num_pages = 0;



	/**

	 * The amount of comment pages.

	 *

	 * @since 2.7.0

	 * @access public

	 * @var int

	 */

	var $max_num_comment_pages = 0;



	/**

	 * Set if query is single post.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_single = false;



	/**

	 * Set if query is preview of blog.

	 *

	 * @since 2.0.0

	 * @access public

	 * @var bool

	 */

	var $is_preview = false;



	/**

	 * Set if query returns a page.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_page = false;



	/**

	 * Set if query is an archive list.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_archive = false;



	/**

	 * Set if query is part of a date.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_date = false;



	/**

	 * Set if query contains a year.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_year = false;



	/**

	 * Set if query contains a month.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_month = false;



	/**

	 * Set if query contains a day.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_day = false;



	/**

	 * Set if query contains time.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_time = false;



	/**

	 * Set if query contains an author.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_author = false;



	/**

	 * Set if query contains category.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_category = false;



	/**

	 * Set if query contains tag.

	 *

	 * @since 2.3.0

	 * @access public

	 * @var bool

	 */

	var $is_tag = false;



	/**

	 * Set if query contains taxonomy.

	 *

	 * @since 2.5.0

	 * @access public

	 * @var bool

	 */

	var $is_tax = false;



	/**

	 * Set if query was part of a search result.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_search = false;



	/**

	 * Set if query is feed display.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_feed = false;



	/**

	 * Set if query is comment feed display.

	 *

	 * @since 2.2.0

	 * @access public

	 * @var bool

	 */

	var $is_comment_feed = false;



	/**

	 * Set if query is trackback.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_trackback = false;



	/**

	 * Set if query is blog homepage.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_home = false;



	/**

	 * Set if query couldn't found anything.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_404 = false;



	/**

	 * Set if query is within comments popup window.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_comments_popup = false;



	/**

	 * Set if query is paged

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_paged = false;



	/**

	 * Set if query is part of administration page.

	 *

	 * @since 1.5.0

	 * @access public

	 * @var bool

	 */

	var $is_admin = false;



	/**

	 * Set if query is an attachment.

	 *

	 * @since 2.0.0

	 * @access public

	 * @var bool

	 */

	var $is_attachment = false;



	/**

	 * Set if is single, is a page, or is an attachment.

	 *

	 * @since 2.1.0

	 * @access public

	 * @var bool

	 */

	var $is_singular = false;



	/**

	 * Set if query is for robots.

	 *

	 * @since 2.1.0

	 * @access public

	 * @var bool

	 */

	var $is_robots = false;



	/**

	 * Set if query contains posts.

	 *

	 * Basically, the homepage if the option isn't set for the static homepage.

	 *

	 * @since 2.1.0

	 * @access public

	 * @var bool

	 */

	var $is_posts_page = false;



	/**

	 * Set if query is for a post type archive.

	 *

	 * @since 3.1.0

	 * @access public

	 * @var bool

	 */

	var $is_post_type_archive = false;



	/**

	 * Stores the ->query_vars state like md5(serialize( $this->query_vars ) ) so we know

	 * whether we have to re-parse because something has changed

	 *

	 * @since 3.1.0

	 * @access private

	 */

	var $query_vars_hash = false;



	/**

	 * Whether query vars have changed since the initial parse_query() call.  Used to catch modifications to query vars made

	 * via pre_get_posts hooks.

	 *

	 * @since 3.1.1

	 * @access private

	 */

	var $query_vars_changed = true;



	/**

	 * Resets query flags to false.

	 *

	 * The query flags are what page info WordPress was able to figure out.

	 *

	 * @since 2.0.0

	 * @access private

	 */

	function init_query_flags() {

		$this->is_single = false;

		$this->is_preview = false;

		$this->is_page = false;

		$this->is_archive = false;

		$this->is_date = false;

		$this->is_year = false;

		$this->is_month = false;

		$this->is_day = false;

		$this->is_time = false;

		$this->is_author = false;

		$this->is_category = false;

		$this->is_tag = false;

		$this->is_tax = false;

		$this->is_search = false;

		$this->is_feed = false;

		$this->is_comment_feed = false;

		$this->is_trackback = false;

		$this->is_home = false;

		$this->is_404 = false;

		$this->is_comments_popup = false;

		$this->is_paged = false;

		$this->is_admin = false;

		$this->is_attachment = false;

		$this->is_singular = false;

		$this->is_robots = false;

		$this->is_posts_page = false;

		$this->is_post_type_archive = false;

	}



	/**

	 * Initiates object properties and sets default values.

	 *

	 * @since 1.5.0

	 * @access public

	 */

	function init() {

		unset($this->posts);

		unset($this->query);

		$this->query_vars = array();

		unset($this->queried_object);

		unset($this->queried_object_id);

		$this->post_count = 0;

		$this->current_post = -1;

		$this->in_the_loop = false;

		unset( $this->request );

		unset( $this->post );

		unset( $this->comments );

		unset( $this->comment );

		$this->comment_count = 0;

		$this->current_comment = -1;

		$this->found_posts = 0;

		$this->max_num_pages = 0;

		$this->max_num_comment_pages = 0;



		$this->init_query_flags();

	}



	/**

	 * Reparse the query vars.

	 *

	 * @since 1.5.0

	 * @access public

	 */

	function parse_query_vars() {

		$this->parse_query();

	}



	/**

	 * Fills in the query variables, which do not exist within the parameter.

	 *

	 * @since 2.1.0

	 * @access public

	 *

	 * @param array $array Defined query variables.

	 * @return array Complete query variables with undefined ones filled in empty.

	 */

	function fill_query_vars($array) {

		$keys = array(

			'error'

			, 'm'

			, 'p'

			, 'post_parent'

			, 'subpost'

			, 'subpost_id'

			, 'attachment'

			, 'attachment_id'

			, 'name'

			, 'static'

			, 'pagename'

			, 'page_id'

			, 'second'

			, 'minute'

			, 'hour'

			, 'day'

			, 'monthnum'

			, 'year'

			, 'w'

			, 'category_name'

			, 'tag'

			, 'cat'

			, 'tag_id'

			, 'author_name'

			, 'feed'

			, 'tb'

			, 'paged'

			, 'comments_popup'

			, 'meta_key'

			, 'meta_value'

			, 'preview'

			, 's'

			, 'sentence'

			, 'fields'

		);



		foreach ( $keys as $key ) {

			if ( !isset($array[$key]) )

				$array[$key] = '';

		}



		$array_keys = array('category__in', 'category__not_in', 'category__and', 'post__in', 'post__not_in',

			'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and');



		foreach ( $array_keys as $key ) {

			if ( !isset($array[$key]) )

				$array[$key] = array();

		}

		return $array;

	}



	/**

	 * Parse a query string and set query type booleans.

	 *

	 * @since 1.5.0

	 * @access public

	 *

	 * @param string|array $query Optional query.

	 */

	function parse_query( $query =  '' ) {

		if ( ! empty( $query ) ) {

			$this->init();

			$this->query = $this->query_vars = wp_parse_args( $query );

		} elseif ( ! isset( $this->query ) ) {

			$this->query = $this->query_vars;

		}



		$this->query_vars = $this->fill_query_vars($this->query_vars);

		$qv = &$this->query_vars;

		$this->query_vars_changed = true;



		if ( ! empty($qv['robots']) )

			$this->is_robots = true;



		$qv['p'] =  absint($qv['p']);

		$qv['page_id'] =  absint($qv['page_id']);

		$qv['year'] = absint($qv['year']);

		$qv['monthnum'] = absint($qv['monthnum']);

		$qv['day'] = absint($qv['day']);

		$qv['w'] = absint($qv['w']);

		$qv['m'] = absint($qv['m']);

		$qv['paged'] = absint($qv['paged']);

		$qv['cat'] = preg_replace( '|[^0-9,-]|', '', $qv['cat'] ); // comma separated list of positive or negative integers

		$qv['pagename'] = trim( $qv['pagename'] );

		$qv['name'] = trim( $qv['name'] );

		if ( '' !== $qv['hour'] ) $qv['hour'] = absint($qv['hour']);

		if ( '' !== $qv['minute'] ) $qv['minute'] = absint($qv['minute']);

		if ( '' !== $qv['second'] ) $qv['second'] = absint($qv['second']);



		// Compat.  Map subpost to attachment.

		if ( '' != $qv['subpost'] )

			$qv['attachment'] = $qv['subpost'];

		if ( '' != $qv['subpost_id'] )

			$qv['attachment_id'] = $qv['subpost_id'];



		$qv['attachment_id'] = absint($qv['attachment_id']);



		if ( ('' != $qv['attachment']) || !empty($qv['attachment_id']) ) {

			$this->is_single = true;

			$this->is_attachment = true;

		} elseif ( '' != $qv['name'] ) {

			$this->is_single = true;

		} elseif ( $qv['p'] ) {

			$this->is_single = true;

		} elseif ( ('' !== $qv['hour']) && ('' !== $qv['minute']) &&('' !== $qv['second']) && ('' != $qv['year']) && ('' != $qv['monthnum']) && ('' != $qv['day']) ) {

			// If year, month, day, hour, minute, and second are set, a single

			// post is being queried.

			$this->is_single = true;

		} elseif ( '' != $qv['static'] || '' != $qv['pagename'] || !empty($qv['page_id']) ) {

			$this->is_page = true;

			$this->is_single = false;

		} else {

		// Look for archive queries.  Dates, categories, authors, search, post type archives.



			if ( !empty($qv['s']) ) {

				$this->is_search = true;

			}



			if ( '' !== $qv['second'] ) {

				$this->is_time = true;

				$this->is_date = true;

			}



			if ( '' !== $qv['minute'] ) {

				$this->is_time = true;

				$this->is_date = true;

			}



			if ( '' !== $qv['hour'] ) {

				$this->is_time = true;

				$this->is_date = true;

			}



			if ( $qv['day'] ) {

				if ( ! $this->is_date ) {

					$this->is_day = true;

					$this->is_date = true;

				}

			}



			if ( $qv['monthnum'] ) {

				if ( ! $this->is_date ) {

					$this->is_month = true;

					$this->is_date = true;

				}

			}



			if ( $qv['year'] ) {

				if ( ! $this->is_date ) {

					$this->is_year = true;

					$this->is_date = true;

				}

			}



			if ( $qv['m'] ) {

				$this->is_date = true;

				if ( strlen($qv['m']) > 9 ) {

					$this->is_time = true;

				} else if ( strlen($qv['m']) > 7 ) {

					$this->is_day = true;

				} else if ( strlen($qv['m']) > 5 ) {

					$this->is_month = true;

				} else {

					$this->is_year = true;

				}

			}



			if ( '' != $qv['w'] ) {

				$this->is_date = true;

			}



			$this->query_vars_hash = false;

			$this->parse_tax_query( $qv );



			foreach ( $this->tax_query->queries as $tax_query ) {

				if ( 'IN' == $tax_query['operator'] ) {

					switch ( $tax_query['taxonomy'] ) {

						case 'category':

							$this->is_category = true;

							break;

						case 'post_tag':

							$this->is_tag = true;

							break;

						default:

							$this->is_tax = true;

					}

				}

			}

			unset( $tax_query );



			_parse_meta_query( $qv );



			if ( empty($qv['author']) || ($qv['author'] == '0') ) {

				$this->is_author = false;

			} else {

				$this->is_author = true;

			}



			if ( '' != $qv['author_name'] )

				$this->is_author = true;



			if ( !empty( $qv['post_type'] ) && ! is_array( $qv['post_type'] ) ) {

				$post_type_obj = get_post_type_object( $qv['post_type'] );

				if ( ! empty( $post_type_obj->has_archive ) )

					$this->is_post_type_archive = true;

			}



			if ( $this->is_post_type_archive || $this->is_date || $this->is_author || $this->is_category || $this->is_tag || $this->is_tax )

				$this->is_archive = true;

		}



		if ( '' != $qv['feed'] )

			$this->is_feed = true;



		if ( '' != $qv['tb'] )

			$this->is_trackback = true;



		if ( '' != $qv['paged'] && ( intval($qv['paged']) > 1 ) )

			$this->is_paged = true;



		if ( '' != $qv['comments_popup'] )

			$this->is_comments_popup = true;



		// if we're previewing inside the write screen

		if ( '' != $qv['preview'] )

			$this->is_preview = true;



		if ( is_admin() )

			$this->is_admin = true;



		if ( false !== strpos($qv['feed'], 'comments-') ) {

			$qv['feed'] = str_replace('comments-', '', $qv['feed']);

			$qv['withcomments'] = 1;

		}



		$this->is_singular = $this->is_single || $this->is_page || $this->is_attachment;



		if ( $this->is_feed && ( !empty($qv['withcomments']) || ( empty($qv['withoutcomments']) && $this->is_singular ) ) )

			$this->is_comment_feed = true;



		if ( !( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_comments_popup || $this->is_robots ) )

			$this->is_home = true;



		// Correct is_* for page_on_front and page_for_posts

		if ( $this->is_home && 'page' == get_option('show_on_front') && get_option('page_on_front') ) {

			$_query = wp_parse_args($this->query);

			// pagename can be set and empty depending on matched rewrite rules. Ignore an empty pagename.

			if ( isset($_query['pagename']) && '' == $_query['pagename'] )

				unset($_query['pagename']);

			if ( empty($_query) || !array_diff( array_keys($_query), array('preview', 'page', 'paged', 'cpage') ) ) {

				$this->is_page = true;

				$this->is_home = false;

				$qv['page_id'] = get_option('page_on_front');

				// Correct <!--nextpage--> for page_on_front

				if ( !empty($qv['paged']) ) {

					$qv['page'] = $qv['paged'];

					unset($qv['paged']);

				}

			}

		}



		if ( '' != $qv['pagename'] ) {

			$this->queried_object =& get_page_by_path($qv['pagename']);

			if ( !empty($this->queried_object) )

				$this->queried_object_id = (int) $this->queried_object->ID;

			else

				unset($this->queried_object);



			if  ( 'page' == get_option('show_on_front') && isset($this->queried_object_id) && $this->queried_object_id == get_option('page_for_posts') ) {

				$this->is_page = false;

				$this->is_home = true;

				$this->is_posts_page = true;

			}

		}



		if ( $qv['page_id'] ) {

			if  ( 'page' == get_option('show_on_front') && $qv['page_id'] == get_option('page_for_posts') ) {

				$this->is_page = false;

				$this->is_home = true;

				$this->is_posts_page = true;

			}

		}



		if ( !empty($qv['post_type']) ) {

			if ( is_array($qv['post_type']) )

				$qv['post_type'] = array_map('sanitize_key', $qv['post_type']);

			else

				$qv['post_type'] = sanitize_key($qv['post_type']);

		}



		if ( !empty($qv['post_status']) )

			$qv['post_status'] = preg_replace('|[^a-z0-9_,-]|', '', $qv['post_status']);



		if ( $this->is_posts_page && ( ! isset($qv['withcomments']) || ! $qv['withcomments'] ) )

			$this->is_comment_feed = false;



		$this->is_singular = $this->is_single || $this->is_page || $this->is_attachment;

		// Done correcting is_* for page_on_front and page_for_posts



		if ( '404' == $qv['error'] )

			$this->set_404();



		$this->query_vars_hash = md5( serialize( $this->query_vars ) );

		$this->query_vars_changed = false;



		do_action_ref_array('parse_query', array(&$this));

	}



	/*

	 * Parses various taxonomy related query vars.

	 *

	 * @access protected

	 * @since 3.1.0

	 *

	 * @param array &$q The query variables

	 */

	function parse_tax_query( &$q ) {

		if ( ! empty( $q['tax_query'] ) && is_array( $q['tax_query'] ) ) {

			$tax_query = $q['tax_query'];

		} else {

			$tax_query = array();

		}



		if ( !empty($q['taxonomy']) && !empty($q['term']) ) {

			$tax_query[] = array(

				'taxonomy' => $q['taxonomy'],

				'terms' => array( $q['term'] ),

				'field' => 'slug',

			);

		}



		foreach ( $GLOBALS['wp_taxonomies'] as $taxonomy => $t ) {

			if ( 'post_tag' == $taxonomy )

				continue;	// Handled further down in the $q['tag'] block



			if ( $t->query_var && !empty( $q[$t->query_var] ) ) {

				$tax_query_defaults = array(

					'taxonomy' => $taxonomy,

					'field' => 'slug',

				);



 				if ( isset( $t->rewrite['hierarchical'] ) && $t->rewrite['hierarchical'] ) {

					$q[$t->query_var] = wp_basename( $q[$t->query_var] );

				}



				$term = $q[$t->query_var];



				if ( strpos($term, '+') !== false ) {

					$terms = preg_split( '/[+]+/', $term );

					foreach ( $terms as $term ) {

						$tax_query[] = array_merge( $tax_query_defaults, array(

							'terms' => array( $term )

						) );

					}

				} else {

					$tax_query[] = array_merge( $tax_query_defaults, array(

						'terms' => preg_split( '/[,]+/', $term )

					) );

				}

			}

		}



		// Category stuff

		if ( !empty($q['cat']) && '0' != $q['cat'] && !$this->is_singular && $this->query_vars_changed ) {

			$q['cat'] = ''.urldecode($q['cat']).'';

			$q['cat'] = addslashes_gpc($q['cat']);

			$cat_array = preg_split('/[,\s]+/', $q['cat']);

			$q['cat'] = '';

			$req_cats = array();

			foreach ( (array) $cat_array as $cat ) {

				$cat = intval($cat);

				$req_cats[] = $cat;

				$in = ($cat > 0);

				$cat = abs($cat);

				if ( $in ) {

					$q['category__in'][] = $cat;

					$q['category__in'] = array_merge( $q['category__in'], get_term_children($cat, 'category') );

				} else {

					$q['category__not_in'][] = $cat;

					$q['category__not_in'] = array_merge( $q['category__not_in'], get_term_children($cat, 'category') );

				}

			}

			$q['cat'] = implode(',', $req_cats);

		}



		if ( !empty($q['category__in']) ) {

			$q['category__in'] = array_map('absint', array_unique( (array) $q['category__in'] ) );

			$tax_query[] = array(

				'taxonomy' => 'category',

				'terms' => $q['category__in'],

				'field' => 'term_id',

				'include_children' => false

			);

		}



		if ( !empty($q['category__not_in']) ) {

			$q['category__not_in'] = array_map('absint', array_unique( (array) $q['category__not_in'] ) );

			$tax_query[] = array(

				'taxonomy' => 'category',

				'terms' => $q['category__not_in'],

				'operator' => 'NOT IN',

				'include_children' => false

			);

		}



		if ( !empty($q['category__and']) ) {

			$q['category__and'] = array_map('absint', array_unique( (array) $q['category__and'] ) );

			$tax_query[] = array(

				'taxonomy' => 'category',

				'terms' => $q['category__and'],

				'field' => 'term_id',

				'operator' => 'AND',

				'include_children' => false

			);

		}



		// Tag stuff

		if ( '' != $q['tag'] && !$this->is_singular && $this->query_vars_changed ) {

			if ( strpos($q['tag'], ',') !== false ) {

				$tags = preg_split('/[,\s]+/', $q['tag']);

				foreach ( (array) $tags as $tag ) {

					$tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');

					$q['tag_slug__in'][] = $tag;

				}

			} else if ( preg_match('/[+\s]+/', $q['tag']) || !empty($q['cat']) ) {

				$tags = preg_split('/[+\s]+/', $q['tag']);

				foreach ( (array) $tags as $tag ) {

					$tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');

					$q['tag_slug__and'][] = $tag;

				}

			} else {

				$q['tag'] = sanitize_term_field('slug', $q['tag'], 0, 'post_tag', 'db');

				$q['tag_slug__in'][] = $q['tag'];

			}

		}



		if ( !empty($q['tag_id']) ) {

			$q['tag_id'] = absint( $q['tag_id'] );

			$tax_query[] = array(

				'taxonomy' => 'post_tag',

				'terms' => $q['tag_id']

			);

		}



		if ( !empty($q['tag__in']) ) {

			$q['tag__in'] = array_map('absint', array_unique( (array) $q['tag__in'] ) );

			$tax_query[] = array(

				'taxonomy' => 'post_tag',

				'terms' => $q['tag__in']

			);

		}



		if ( !empty($q['tag__not_in']) ) {

			$q['tag__not_in'] = array_map('absint', array_unique( (array) $q['tag__not_in'] ) );

			$tax_query[] = array(

				'taxonomy' => 'post_tag',

				'terms' => $q['tag__not_in'],

				'operator' => 'NOT IN'

			);

		}



		if ( !empty($q['tag__and']) ) {

			$q['tag__and'] = array_map('absint', array_unique( (array) $q['tag__and'] ) );

			$tax_query[] = array(

				'taxonomy' => 'post_tag',

				'terms' => $q['tag__and'],

				'operator' => 'AND'

			);

		}



		if ( !empty($q['tag_slug__in']) ) {

			$q['tag_slug__in'] = array_map('sanitize_title', array_unique( (array) $q['tag_slug__in'] ) );

			$tax_query[] = array(

				'taxonomy' => 'post_tag',

				'terms' => $q['tag_slug__in'],

				'field' => 'slug'

			);

		}



		if ( !empty($q['tag_slug__and']) ) {

			$q['tag_slug__and'] = array_map('sanitize_title', array_unique( (array) $q['tag_slug__and'] ) );

			$tax_query[] = array(

				'taxonomy' => 'post_tag',

				'terms' => $q['tag_slug__and'],

				'field' => 'slug',

				'operator' => 'AND'

			);

		}



		$this->tax_query = new WP_Tax_Query( $tax_query );

	}



	/**

	 * Sets the 404 property and saves whether query is feed.

	 *

	 * @since 2.0.0

	 * @access public

	 */

	function set_404() {

		$is_feed = $this->is_feed;



		$this->init_query_flags();

		$this->is_404 = true;



		$this->is_feed = $is_feed;

	}



	/**

	 * Retrieve query variable.

	 *

	 * @since 1.5.0

	 * @access public

	 *

	 * @param string $query_var Query variable key.

	 * @return mixed

	 */

	function get($query_var) {

		if ( isset($this->query_vars[$query_var]) )

			return $this->query_vars[$query_var];



		return '';

	}



	/**

	 * Set query variable.

	 *

	 * @since 1.5.0

	 * @access public

	 *

	 * @param string $query_var Query variable key.

	 * @param mixed $value Query variable value.

	 */

	function set($query_var, $value) {

		$this->query_vars[$query_var] = $value;

	}



	/**

	 * Retrieve the posts based on query variables.

	 *

	 * There are a few filters and actions that can be used to modify the post

	 * database query.

	 *

	 * @since 1.5.0

	 * @access public

	 * @uses do_action_ref_array() Calls 'pre_get_posts' hook before retrieving posts.

	 *

	 * @return array List of posts.

	 */

	function &get_posts() {

		global $wpdb, $user_ID, $_wp_using_ext_object_cache;



		$this->parse_query();



		do_action_ref_array('pre_get_posts', array(&$this));



		// Shorthand.

		$q = &$this->query_vars;



		// Fill again in case pre_get_posts unset some vars.

		$q = $this->fill_query_vars($q);



		// Set a flag if a pre_get_posts hook changed the query vars.

		$hash = md5( serialize( $this->query_vars ) );

		if ( $hash != $this->query_vars_hash ) {

			$this->query_vars_changed = true;

			$this->query_vars_hash = $hash;

		}

		unset($hash);



		// First let's clear some variables

		$distinct = '';

		$whichauthor = '';

		$whichmimetype = '';

		$where = '';

		$limits = '';

		$join = '';

		$search = '';

		$groupby = '';

		$fields = '';

		$post_status_join = false;

		$page = 1;



		if ( isset( $q['caller_get_posts'] ) ) {

			_deprecated_argument( 'WP_Query', '3.1', __( '"caller_get_posts" is deprecated. Use "ignore_sticky_posts" instead.' ) );

			if ( !isset( $q['ignore_sticky_posts'] ) )

				$q['ignore_sticky_posts'] = $q['caller_get_posts'];

		}



		if ( !isset( $q['ignore_sticky_posts'] ) )

			$q['ignore_sticky_posts'] = false;



		if ( !isset($q['suppress_filters']) )

			$q['suppress_filters'] = false;



		if ( !isset($q['cache_results']) ) {

			if ( $_wp_using_ext_object_cache )

				$q['cache_results'] = false;

			else

				$q['cache_results'] = true;

		}



		if ( !isset($q['update_post_term_cache']) )

			$q['update_post_term_cache'] = true;



		if ( !isset($q['update_post_meta_cache']) )

			$q['update_post_meta_cache'] = true;



		if ( !isset($q['post_type']) ) {

			if ( $this->is_search )

				$q['post_type'] = 'any';

			else

				$q['post_type'] = '';

		}

		$post_type = $q['post_type'];

		if ( !isset($q['posts_per_page']) || $q['posts_per_page'] == 0 )

			$q['posts_per_page'] = get_option('posts_per_page');

		if ( isset($q['showposts']) && $q['showposts'] ) {

			$q['showposts'] = (int) $q['showposts'];

			$q['posts_per_page'] = $q['showposts'];

		}

		if ( (isset($q['posts_per_archive_page']) && $q['posts_per_archive_page'] != 0) && ($this->is_archive || $this->is_search) )

			$q['posts_per_page'] = $q['posts_per_archive_page'];

		if ( !isset($q['nopaging']) ) {

			if ( $q['posts_per_page'] == -1 ) {

				$q['nopaging'] = true;

			} else {

				$q['nopaging'] = false;

			}

		}

		if ( $this->is_feed ) {

			$q['posts_per_page'] = get_option('posts_per_rss');

			$q['nopaging'] = false;

		}

		$q['posts_per_page'] = (int) $q['posts_per_page'];

		if ( $q['posts_per_page'] < -1 )

			$q['posts_per_page'] = abs($q['posts_per_page']);

		else if ( $q['posts_per_page'] == 0 )

			$q['posts_per_page'] = 1;



		if ( !isset($q['comments_per_page']) || $q['comments_per_page'] == 0 )

			$q['comments_per_page'] = get_option('comments_per_page');



		if ( $this->is_home && (empty($this->query) || $q['preview'] == 'true') && ( 'page' == get_option('show_on_front') ) && get_option('page_on_front') ) {

			$this->is_page = true;

			$this->is_home = false;

			$q['page_id'] = get_option('page_on_front');

		}



		if ( isset($q['page']) ) {

			$q['page'] = trim($q['page'], '/');

			$q['page'] = absint($q['page']);

		}



		// If true, forcibly turns off SQL_CALC_FOUND_ROWS even when limits are present.

		if ( isset($q['no_found_rows']) )

			$q['no_found_rows'] = (bool) $q['no_found_rows'];

		else

			$q['no_found_rows'] = false;



		switch ( $q['fields'] ) {

			case 'ids':

				$fields = "$wpdb->posts.ID";

				break;

			case 'id=>parent':

				$fields = "$wpdb->posts.ID, $wpdb->posts.post_parent";

				break;

			default:

				$fields = "$wpdb->posts.*";

		}



		// If a month is specified in the querystring, load that month

		if ( $q['m'] ) {

			$q['m'] = '' . preg_replace('|[^0-9]|', '', $q['m']);

			$where .= " AND YEAR($wpdb->posts.post_date)=" . substr($q['m'], 0, 4);

			if ( strlen($q['m']) > 5 )

				$where .= " AND MONTH($wpdb->posts.post_date)=" . substr($q['m'], 4, 2);

			if ( strlen($q['m']) > 7 )

				$where .= " AND DAYOFMONTH($wpdb->posts.post_date)=" . substr($q['m'], 6, 2);

			if ( strlen($q['m']) > 9 )

				$where .= " AND HOUR($wpdb->posts.post_date)=" . substr($q['m'], 8, 2);

			if ( strlen($q['m']) > 11 )

				$where .= " AND MINUTE($wpdb->posts.post_date)=" . substr($q['m'], 10, 2);

			if ( strlen($q['m']) > 13 )

				$where .= " AND SECOND($wpdb->posts.post_date)=" . substr($q['m'], 12, 2);

		}



		if ( '' !== $q['hour'] )

			$where .= " AND HOUR($wpdb->posts.post_date)='" . $q['hour'] . "'";



		if ( '' !== $q['minute'] )

			$where .= " AND MINUTE($wpdb->posts.post_date)='" . $q['minute'] . "'";



		if ( '' !== $q['second'] )

			$where .= " AND SECOND($wpdb->posts.post_date)='" . $q['second'] . "'";



		if ( $q['year'] )

			$where .= " AND YEAR($wpdb->posts.post_date)='" . $q['year'] . "'";



		if ( $q['monthnum'] )

			$where .= " AND MONTH($wpdb->posts.post_date)='" . $q['monthnum'] . "'";



		if ( $q['day'] )

			$where .= " AND DAYOFMONTH($wpdb->posts.post_date)='" . $q['day'] . "'";



		// If we've got a post_type AND its not "any" post_type.

		if ( !empty($q['post_type']) && 'any' != $q['post_type'] ) {

			foreach ( (array)$q['post_type'] as $_post_type ) {

				$ptype_obj = get_post_type_object($_post_type);

				if ( !$ptype_obj || !$ptype_obj->query_var || empty($q[ $ptype_obj->query_var ]) )

					continue;



				if ( ! $ptype_obj->hierarchical || strpos($q[ $ptype_obj->query_var ], '/') === false ) {

					// Non-hierarchical post_types & parent-level-hierarchical post_types can directly use 'name'

					$q['name'] = $q[ $ptype_obj->query_var ];

				} else {

					// Hierarchical post_types will operate through the

					$q['pagename'] = $q[ $ptype_obj->query_var ];

					$q['name'] = '';

				}



				// Only one request for a slug is possible, this is why name & pagename are overwritten above.

				break;

			} //end foreach

			unset($ptype_obj);

		}



		if ( '' != $q['name'] ) {

			$q['name'] = sanitize_title_for_query( $q['name'] );

			$where .= " AND $wpdb->posts.post_name = '" . $q['name'] . "'";

		} elseif ( '' != $q['pagename'] ) {

			if ( isset($this->queried_object_id) ) {

				$reqpage = $this->queried_object_id;

			} else {

				if ( 'page' != $q['post_type'] ) {

					foreach ( (array)$q['post_type'] as $_post_type ) {

						$ptype_obj = get_post_type_object($_post_type);

						if ( !$ptype_obj || !$ptype_obj->hierarchical )

							continue;



						$reqpage = get_page_by_path($q['pagename'], OBJECT, $_post_type);

						if ( $reqpage )

							break;

					}

					unset($ptype_obj);

				} else {

					$reqpage = get_page_by_path($q['pagename']);

				}

				if ( !empty($reqpage) )

					$reqpage = $reqpage->ID;

				else

					$reqpage = 0;

			}



			$page_for_posts = get_option('page_for_posts');

			if  ( ('page' != get_option('show_on_front') ) || empty($page_for_posts) || ( $reqpage != $page_for_posts ) ) {

				$q['pagename'] = sanitize_title_for_query( wp_basename( $q['pagename'] ) );

				$q['name'] = $q['pagename'];

				$where .= " AND ($wpdb->posts.ID = '$reqpage')";

				$reqpage_obj = get_page($reqpage);

				if ( is_object($reqpage_obj) && 'attachment' == $reqpage_obj->post_type ) {

					$this->is_attachment = true;

					$post_type = $q['post_type'] = 'attachment';

					$this->is_page = true;

					$q['attachment_id'] = $reqpage;

				}

			}

		} elseif ( '' != $q['attachment'] ) {

			$q['attachment'] = sanitize_title_for_query( wp_basename( $q['attachment'] ) );

			$q['name'] = $q['attachment'];

			$where .= " AND $wpdb->posts.post_name = '" . $q['attachment'] . "'";

		}



		if ( $q['w'] )

			$where .= ' AND ' . _wp_mysql_week( "`$wpdb->posts`.`post_date`" ) . " = '" . $q['w'] . "'";



		if ( intval($q['comments_popup']) )

			$q['p'] = absint($q['comments_popup']);



		// If an attachment is requested by number, let it supercede any post number.

		if ( $q['attachment_id'] )

			$q['p'] = absint($q['attachment_id']);



		// If a post number is specified, load that post

		if ( $q['p'] ) {

			$where .= " AND {$wpdb->posts}.ID = " . $q['p'];

		} elseif ( $q['post__in'] ) {

			$post__in = implode(',', array_map( 'absint', $q['post__in'] ));

			$where .= " AND {$wpdb->posts}.ID IN ($post__in)";

		} elseif ( $q['post__not_in'] ) {

			$post__not_in = implode(',',  array_map( 'absint', $q['post__not_in'] ));

			$where .= " AND {$wpdb->posts}.ID NOT IN ($post__not_in)";

		}



		if ( is_numeric($q['post_parent']) )

			$where .= $wpdb->prepare( " AND $wpdb->posts.post_parent = %d ", $q['post_parent'] );



		if ( $q['page_id'] ) {

			if  ( ('page' != get_option('show_on_front') ) || ( $q['page_id'] != get_option('page_for_posts') ) ) {

				$q['p'] = $q['page_id'];

				$where = " AND {$wpdb->posts}.ID = " . $q['page_id'];

			}

		}



		// If a search pattern is specified, load the posts that match

		if ( !empty($q['s']) ) {

			// added slashes screw with quote grouping when done early, so done later

			$q['s'] = stripslashes($q['s']);

			if ( !empty($q['sentence']) ) {

				$q['search_terms'] = array($q['s']);

			} else {

				preg_match_all('/".*?("|$)|((?<=[\\s",+])|^)[^\\s",+]+/', $q['s'], $matches);

				$q['search_terms'] = array_map('_search_terms_tidy', $matches[0]);

			}

			$n = !empty($q['exact']) ? '' : '%';

			$searchand = '';

			foreach( (array) $q['search_terms'] as $term ) {

				$term = esc_sql( like_escape( $term ) );

				$search .= "{$searchand}(($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}'))";

				$searchand = ' AND ';

			}

			$term = esc_sql( like_escape( $q['s'] ) );

			if ( empty($q['sentence']) && count($q['search_terms']) > 1 && $q['search_terms'][0] != $q['s'] )

				$search .= " OR ($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}')";



			if ( !empty($search) ) {

				$search = " AND ({$search}) ";

				if ( !is_user_logged_in() )

					$search .= " AND ($wpdb->posts.post_password = '') ";

			}

		}



		// Allow plugins to contextually add/remove/modify the search section of the database query

		$search = apply_filters_ref_array('posts_search', array( $search, &$this ) );



		// Taxonomies

		if ( !$this->is_singular ) {

			$this->parse_tax_query( $q );



			$clauses = $this->tax_query->get_sql( $wpdb->posts, 'ID' );



			$join .= $clauses['join'];

			$where .= $clauses['where'];

		}



		if ( $this->is_tax ) {

			if ( empty($post_type) ) {

				$post_type = 'any';

				$post_status_join = true;

			} elseif ( in_array('attachment', (array) $post_type) ) {

				$post_status_join = true;

			}

		}



		// Back-compat

		if ( !empty($this->tax_query->queries) ) {

			$tax_query_in_and = wp_list_filter( $this->tax_query->queries, array( 'operator' => 'NOT IN' ), 'NOT' );

			if ( !empty( $tax_query_in_and ) ) {

				if ( !isset( $q['taxonomy'] ) ) {

					foreach ( $tax_query_in_and as $a_tax_query ) {

						if ( !in_array( $a_tax_query['taxonomy'], array( 'category', 'post_tag' ) ) ) {

							$q['taxonomy'] = $a_tax_query['taxonomy'];

							if ( 'slug' == $a_tax_query['field'] )

								$q['term'] = $a_tax_query['terms'][0];

							else

								$q['term_id'] = $a_tax_query['terms'][0];



							break;

						}

					}

				}



				$cat_query = wp_list_filter( $tax_query_in_and, array( 'taxonomy' => 'category' ) );

				if ( !empty( $cat_query ) ) {

					$cat_query = reset( $cat_query );

					$the_cat = get_term_by( $cat_query['field'], $cat_query['terms'][0], 'category' );

					if ( $the_cat ) {

						$this->set( 'cat', $the_cat->term_id );

						$this->set( 'category_name', $the_cat->slug );

					}

					unset( $the_cat );

				}

				unset( $cat_query );



				$tag_query = wp_list_filter( $tax_query_in_and, array( 'taxonomy' => 'post_tag' ) );

				if ( !empty( $tag_query ) ) {

					$tag_query = reset( $tag_query );

					$the_tag = get_term_by( $tag_query['field'], $tag_query['terms'][0], 'post_tag' );

					if ( $the_tag ) {

						$this->set( 'tag_id', $the_tag->term_id );

					}

					unset( $the_tag );

				}

				unset( $tag_query );

			}

		}



		if ( !empty( $this->tax_query->queries ) || !empty( $q['meta_key'] ) ) {

			$groupby = "{$wpdb->posts}.ID";

		}



		// Author/user stuff



		if ( empty($q['author']) || ($q['author'] == '0') ) {

			$whichauthor = '';

		} else {

			$q['author'] = (string)urldecode($q['author']);

			$q['author'] = addslashes_gpc($q['author']);

			if ( strpos($q['author'], '-') !== false ) {

				$eq = '!=';

				$andor = 'AND';

				$q['author'] = explode('-', $q['author']);

				$q['author'] = (string)absint($q['author'][1]);

			} else {

				$eq = '=';

				$andor = 'OR';

			}

			$author_array = preg_split('/[,\s]+/', $q['author']);

			$_author_array = array();

			foreach ( $author_array as $key => $_author )

				$_author_array[] = "$wpdb->posts.post_author " . $eq . ' ' . absint($_author);

			$whichauthor .= ' AND (' . implode(" $andor ", $_author_array) . ')';

			unset($author_array, $_author_array);

		}



		// Author stuff for nice URLs



		if ( '' != $q['author_name'] ) {

			if ( strpos($q['author_name'], '/') !== false ) {

				$q['author_name'] = explode('/', $q['author_name']);

				if ( $q['author_name'][ count($q['author_name'])-1 ] ) {

					$q['author_name'] = $q['author_name'][count($q['author_name'])-1]; // no trailing slash

				} else {

					$q['author_name'] = $q['author_name'][count($q['author_name'])-2]; // there was a trailling slash

				}

			}

			$q['author_name'] = sanitize_title_for_query( $q['author_name'] );

			$q['author'] = get_user_by('slug', $q['author_name']);

			if ( $q['author'] )

				$q['author'] = $q['author']->ID;

			$whichauthor .= " AND ($wpdb->posts.post_author = " . absint($q['author']) . ')';

		}



		// MIME-Type stuff for attachment browsing



		if ( isset($q['post_mime_type']) && '' != $q['post_mime_type'] ) {

			$table_alias = $post_status_join ? $wpdb->posts : '';

			$whichmimetype = wp_post_mime_type_where($q['post_mime_type'], $table_alias);

		}



		$where .= $search . $whichauthor . $whichmimetype;



		if ( empty($q['order']) || ((strtoupper($q['order']) != 'ASC') && (strtoupper($q['order']) != 'DESC')) )

			$q['order'] = 'DESC';



		// Order by

		if ( empty($q['orderby']) ) {

			$q['orderby'] = "$wpdb->posts.post_date " . $q['order'];

		} elseif ( 'none' == $q['orderby'] ) {

			$q['orderby'] = '';

		} else {

			// Used to filter values

			$allowed_keys = array('author', 'date', 'title', 'modified', 'menu_order', 'parent', 'ID', 'rand', 'comment_count');

			if ( !empty($q['meta_key']) ) {

				$allowed_keys[] = $q['meta_key'];

				$allowed_keys[] = 'meta_value';

				$allowed_keys[] = 'meta_value_num';

			}

			$q['orderby'] = urldecode($q['orderby']);

			$q['orderby'] = addslashes_gpc($q['orderby']);

			$orderby_array = explode(' ', $q['orderby']);

			$q['orderby'] = '';



			foreach ( $orderby_array as $i => $orderby ) {

				// Only allow certain values for safety

				if ( ! in_array($orderby, $allowed_keys) )

					continue;



				switch ( $orderby ) {

					case 'menu_order':

						break;

					case 'ID':

						$orderby = "$wpdb->posts.ID";

						break;

					case 'rand':

						$orderby = 'RAND()';

						break;

					case $q['meta_key']:

					case 'meta_value':

						$orderby = "$wpdb->postmeta.meta_value";

						break;

					case 'meta_value_num':

						$orderby = "$wpdb->postmeta.meta_value+0";

						break;

					case 'comment_count':

						$orderby = "$wpdb->posts.comment_count";

						break;

					default:

						$orderby = "$wpdb->posts.post_" . $orderby;

				}



				$q['orderby'] .= (($i == 0) ? '' : ',') . $orderby;

			}



			// append ASC or DESC at the end

			if ( !empty($q['orderby']))

				$q['orderby'] .= " {$q['order']}";



			if ( empty($q['orderby']) )

				$q['orderby'] = "$wpdb->posts.post_date ".$q['order'];

		}



		if ( is_array( $post_type ) ) {

			$post_type_cap = 'multiple_post_type';

		} else {

			$post_type_object = get_post_type_object( $post_type );

			if ( empty( $post_type_object ) )

				$post_type_cap = $post_type;

		}



		$exclude_post_types = '';

		$in_search_post_types = get_post_types( array('exclude_from_search' => false) );

		if ( ! empty( $in_search_post_types ) )

			$exclude_post_types .= $wpdb->prepare(" AND $wpdb->posts.post_type IN ('" . join("', '", $in_search_post_types ) . "')");



		if ( 'any' == $post_type ) {

			$where .= $exclude_post_types;

		} elseif ( !empty( $post_type ) && is_array( $post_type ) ) {

			$where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $post_type) . "')";

		} elseif ( ! empty( $post_type ) ) {

			$where .= " AND $wpdb->posts.post_type = '$post_type'";

			$post_type_object = get_post_type_object ( $post_type );

		} elseif ( $this->is_attachment ) {

			$where .= " AND $wpdb->posts.post_type = 'attachment'";

			$post_type_object = get_post_type_object ( 'attachment' );

		} elseif ( $this->is_page ) {

			$where .= " AND $wpdb->posts.post_type = 'page'";

			$post_type_object = get_post_type_object ( 'page' );

		} else {

			$where .= " AND $wpdb->posts.post_type = 'post'";

			$post_type_object = get_post_type_object ( 'post' );

		}



		if ( ! empty( $post_type_object ) ) {

			$edit_cap = $post_type_object->cap->edit_post;

			$read_cap = $post_type_object->cap->read_post;

			$edit_others_cap = $post_type_object->cap->edit_others_posts;

			$read_private_cap = $post_type_object->cap->read_private_posts;

		} else {

			$edit_cap = 'edit_' . $post_type_cap;

			$read_cap = 'read_' . $post_type_cap;

			$edit_others_cap = 'edit_others_' . $post_type_cap . 's';

			$read_private_cap = 'read_private_' . $post_type_cap . 's';

		}



		if ( isset($q['post_status']) && '' != $q['post_status'] ) {

			$statuswheres = array();

			$q_status = explode(',', $q['post_status']);

			$r_status = array();

			$p_status = array();

			$e_status = array();

			if ( $q['post_status'] == 'any' ) {

				foreach ( get_post_stati( array('exclude_from_search' => true) ) as $status )

					$e_status[] = "$wpdb->posts.post_status <> '$status'";

			} else {

				foreach ( get_post_stati() as $status ) {

					if ( in_array( $status, $q_status ) ) {

						if ( 'private' == $status )

							$p_status[] = "$wpdb->posts.post_status = '$status'";

						else

							$r_status[] = "$wpdb->posts.post_status = '$status'";

					}

				}

			}



			if ( empty($q['perm'] ) || 'readable' != $q['perm'] ) {

				$r_status = array_merge($r_status, $p_status);

				unset($p_status);

			}



			if ( !empty($e_status) ) {

				$statuswheres[] = "(" . join( ' AND ', $e_status ) . ")";

			}

			if ( !empty($r_status) ) {

				if ( !empty($q['perm'] ) && 'editable' == $q['perm'] && !current_user_can($edit_others_cap) )

					$statuswheres[] = "($wpdb->posts.post_author = $user_ID " .  "AND (" . join( ' OR ', $r_status ) . "))";

				else

					$statuswheres[] = "(" . join( ' OR ', $r_status ) . ")";

			}

			if ( !empty($p_status) ) {

				if ( !empty($q['perm'] ) && 'readable' == $q['perm'] && !current_user_can($read_private_cap) )

					$statuswheres[] = "($wpdb->posts.post_author = $user_ID " .  "AND (" . join( ' OR ', $p_status ) . "))";

				else

					$statuswheres[] = "(" . join( ' OR ', $p_status ) . ")";

			}

			if ( $post_status_join ) {

				$join .= " LEFT JOIN $wpdb->posts AS p2 ON ($wpdb->posts.post_parent = p2.ID) ";

				foreach ( $statuswheres as $index => $statuswhere )

					$statuswheres[$index] = "($statuswhere OR ($wpdb->posts.post_status = 'inherit' AND " . str_replace($wpdb->posts, 'p2', $statuswhere) . "))";

			}

			foreach ( $statuswheres as $statuswhere )

				$where .= " AND $statuswhere";

		} elseif ( !$this->is_singular ) {

			$where .= " AND ($wpdb->posts.post_status = 'publish'";



			// Add public states.

			$public_states = get_post_stati( array('public' => true) );

			foreach ( (array) $public_states as $state ) {

				if ( 'publish' == $state ) // Publish is hard-coded above.

					continue;

				$where .= " OR $wpdb->posts.post_status = '$state'";

			}



			if ( is_admin() ) {

				// Add protected states that should show in the admin all list.

				$admin_all_states = get_post_stati( array('protected' => true, 'show_in_admin_all_list' => true) );

				foreach ( (array) $admin_all_states as $state )

					$where .= " OR $wpdb->posts.post_status = '$state'";

			}



			if ( is_user_logged_in() ) {

				// Add private states that are limited to viewing by the author of a post or someone who has caps to read private states.

				$private_states = get_post_stati( array('private' => true) );

				foreach ( (array) $private_states as $state )

					$where .= current_user_can( $read_private_cap ) ? " OR $wpdb->posts.post_status = '$state'" : " OR $wpdb->posts.post_author = $user_ID AND $wpdb->posts.post_status = '$state'";

			}



			$where .= ')';

		}



		// Parse the meta query again if query vars have changed.

		if ( $this->query_vars_changed ) {

			$meta_query_hash = md5( serialize( $q['meta_query'] ) );

			$_meta_query = $q['meta_query'];

			unset( $q['meta_query'] );

			_parse_meta_query( $q );

			if ( md5( serialize( $q['meta_query'] ) ) != $meta_query_hash && is_array( $_meta_query ) )

				$q['meta_query'] = array_merge( $_meta_query, $q['meta_query'] );

		}



		if ( !empty( $q['meta_query'] ) ) {

			$clauses = call_user_func_array( '_get_meta_sql', array( $q['meta_query'], 'post', $wpdb->posts, 'ID', &$this) );

			$join .= $clauses['join'];

			$where .= $clauses['where'];

		}



		// Apply filters on where and join prior to paging so that any

		// manipulations to them are reflected in the paging by day queries.

		if ( !$q['suppress_filt