/wp-includes/query.php

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<?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 existing 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 an existing 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 existing 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 existing 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 an existing 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 an existing 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 an existing 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 an existing 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 an existing 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 an existing 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 an existing 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 an existing 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 an existing 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 an existing year archive?
 *
 * @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();
}

/**
 * Is the query the main query?
 *
 * @since 3.3.0
 *
 * @return bool
 */
function is_main_query() {
	global $wp_query;
	return $wp_query->is_main_query();
}

/*
 * 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;

	/**
	 * Metadata query container
	 *
	 * @since 3.2.0
	 * @access public
	 * @var object WP_Meta_Query
	 */
	var $meta_query = false;

	/**
	 * 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;

	/**
	 * The amount of found posts for the current query.
	 *
	 * If limit clause was not used, equals $post_count.
	 *
	 * @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;

	/**
	 * Set if post thumbnails are cached
	 *
	 * @since 3.2.0
	 * @access public
	 * @var bool
	 */
	 var $thumbnails_cached = false;

	/**
	 * 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'
			, 'menu_order'
		);

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

		// 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 ( 'NOT 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 );

			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'] ) ) {
			if ( is_array( $qv['post_status'] ) )
				$qv['post_status'] = array_map('sanitize_key', $qv['post_status']);
			else
				$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('/[,\r\n\t ]+/', $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('/[+\r\n\t ]+/', $q['tag']) || !empty($q['cat']) ) {
				$tags = preg_split('/[+\r\n\t ]+/', $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_for_query', 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_for_query', 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);

		// Parse meta query
		$this->meta_query = new WP_Meta_Query();
		$this->meta_query->parse_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 ( '' !== $q['menu_order'] )
			$where .= " AND $wpdb->posts.menu_order = " . $q['menu_order'];

		// 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_post( $reqpage );
				if ( is_object($reqpage_obj) && 'attachment' == $reqpage_obj->post_type ) {
					$this->is_attachment = true;
					$post_type = $q['post_type'] = 'attachment';
					$this->is_page = t…