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/www/wp-includes/comment.php

https://github.com/micz/elencode
PHP | 1627 lines | 820 code | 230 blank | 577 comment | 227 complexity | 0f911624cdbe5ae9b4b47fb694b70b10 MD5 | raw file

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   1<?php
   2/**
   3 * Manages WordPress comments
   4 *
   5 * @package WordPress
   6 * @subpackage Comment
   7 */
   8
   9/**
  10 * Checks whether a comment passes internal checks to be allowed to add.
  11 *
  12 * If comment moderation is set in the administration, then all comments,
  13 * regardless of their type and whitelist will be set to false. If the number of
  14 * links exceeds the amount in the administration, then the check fails. If any
  15 * of the parameter contents match the blacklist of words, then the check fails.
  16 *
  17 * If the number of links exceeds the amount in the administration, then the
  18 * check fails. If any of the parameter contents match the blacklist of words,
  19 * then the check fails.
  20 *
  21 * If the comment is a trackback and part of the blogroll, then the trackback is
  22 * automatically whitelisted. If the comment author was approved before, then
  23 * the comment is automatically whitelisted.
  24 *
  25 * If none of the checks fail, then the failback is to set the check to pass
  26 * (return true).
  27 *
  28 * @since 1.2.0
  29 * @uses $wpdb
  30 *
  31 * @param string $author Comment Author's name
  32 * @param string $email Comment Author's email
  33 * @param string $url Comment Author's URL
  34 * @param string $comment Comment contents
  35 * @param string $user_ip Comment Author's IP address
  36 * @param string $user_agent Comment Author's User Agent
  37 * @param string $comment_type Comment type, either user submitted comment,
  38 *		trackback, or pingback
  39 * @return bool Whether the checks passed (true) and the comments should be
  40 *		displayed or set to moderated
  41 */
  42function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $comment_type) {
  43	global $wpdb;
  44
  45	if ( 1 == get_option('comment_moderation') )
  46		return false; // If moderation is set to manual
  47
  48	if ( get_option('comment_max_links') && preg_match_all("/<[Aa][^>]*[Hh][Rr][Ee][Ff]=['\"]([^\"'>]+)[^>]*>/", apply_filters('comment_text',$comment), $out) >= get_option('comment_max_links') )
  49		return false; // Check # of external links
  50
  51	$mod_keys = trim(get_option('moderation_keys'));
  52	if ( !empty($mod_keys) ) {
  53		$words = explode("\n", $mod_keys );
  54
  55		foreach ( (array) $words as $word) {
  56			$word = trim($word);
  57
  58			// Skip empty lines
  59			if ( empty($word) )
  60				continue;
  61
  62			// Do some escaping magic so that '#' chars in the
  63			// spam words don't break things:
  64			$word = preg_quote($word, '#');
  65
  66			$pattern = "#$word#i";
  67			if ( preg_match($pattern, $author) ) return false;
  68			if ( preg_match($pattern, $email) ) return false;
  69			if ( preg_match($pattern, $url) ) return false;
  70			if ( preg_match($pattern, $comment) ) return false;
  71			if ( preg_match($pattern, $user_ip) ) return false;
  72			if ( preg_match($pattern, $user_agent) ) return false;
  73		}
  74	}
  75
  76	// Comment whitelisting:
  77	if ( 1 == get_option('comment_whitelist')) {
  78		if ( 'trackback' == $comment_type || 'pingback' == $comment_type ) { // check if domain is in blogroll
  79			$uri = parse_url($url);
  80			$domain = $uri['host'];
  81			$uri = parse_url( get_option('home') );
  82			$home_domain = $uri['host'];
  83			if ( $wpdb->get_var($wpdb->prepare("SELECT link_id FROM $wpdb->links WHERE link_url LIKE (%s) LIMIT 1", '%'.$domain.'%')) || $domain == $home_domain )
  84				return true;
  85			else
  86				return false;
  87		} elseif ( $author != '' && $email != '' ) {
  88			// expected_slashed ($author, $email)
  89			$ok_to_comment = $wpdb->get_var("SELECT comment_approved FROM $wpdb->comments WHERE comment_author = '$author' AND comment_author_email = '$email' and comment_approved = '1' LIMIT 1");
  90			if ( ( 1 == $ok_to_comment ) &&
  91				( empty($mod_keys) || false === strpos( $email, $mod_keys) ) )
  92					return true;
  93			else
  94				return false;
  95		} else {
  96			return false;
  97		}
  98	}
  99	return true;
 100}
 101
 102/**
 103 * Retrieve the approved comments for post $post_id.
 104 *
 105 * @since 2.0.0
 106 * @uses $wpdb
 107 *
 108 * @param int $post_id The ID of the post
 109 * @return array $comments The approved comments
 110 */
 111function get_approved_comments($post_id) {
 112	global $wpdb;
 113	return $wpdb->get_results($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1' ORDER BY comment_date", $post_id));
 114}
 115
 116/**
 117 * Retrieves comment data given a comment ID or comment object.
 118 *
 119 * If an object is passed then the comment data will be cached and then returned
 120 * after being passed through a filter. If the comment is empty, then the global
 121 * comment variable will be used, if it is set.
 122 *
 123 * If the comment is empty, then the global comment variable will be used, if it
 124 * is set.
 125 *
 126 * @since 2.0.0
 127 * @uses $wpdb
 128 *
 129 * @param object|string|int $comment Comment to retrieve.
 130 * @param string $output Optional. OBJECT or ARRAY_A or ARRAY_N constants.
 131 * @return object|array|null Depends on $output value.
 132 */
 133function &get_comment(&$comment, $output = OBJECT) {
 134	global $wpdb;
 135
 136	if ( empty($comment) ) {
 137		if ( isset($GLOBALS['comment']) )
 138			$_comment = & $GLOBALS['comment'];
 139		else
 140			$_comment = null;
 141	} elseif ( is_object($comment) ) {
 142		wp_cache_add($comment->comment_ID, $comment, 'comment');
 143		$_comment = $comment;
 144	} else {
 145		if ( isset($GLOBALS['comment']) && ($GLOBALS['comment']->comment_ID == $comment) ) {
 146			$_comment = & $GLOBALS['comment'];
 147		} elseif ( ! $_comment = wp_cache_get($comment, 'comment') ) {
 148			$_comment = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment));
 149			wp_cache_add($_comment->comment_ID, $_comment, 'comment');
 150		}
 151	}
 152
 153	$_comment = apply_filters('get_comment', $_comment);
 154
 155	if ( $output == OBJECT ) {
 156		return $_comment;
 157	} elseif ( $output == ARRAY_A ) {
 158		$__comment = get_object_vars($_comment);
 159		return $__comment;
 160	} elseif ( $output == ARRAY_N ) {
 161		$__comment = array_values(get_object_vars($_comment));
 162		return $__comment;
 163	} else {
 164		return $_comment;
 165	}
 166}
 167
 168/**
 169 * Retrieve a list of comments.
 170 *
 171 * The list of comment arguments are 'status', 'orderby', 'comment_date_gmt',
 172 * 'order', 'number', 'offset', and 'post_id'.
 173 *
 174 * @since 2.7.0
 175 * @uses $wpdb
 176 *
 177 * @param mixed $args Optional. Array or string of options to override defaults.
 178 * @return array List of comments.
 179 */
 180function get_comments( $args = '' ) {
 181	global $wpdb;
 182
 183	$defaults = array('status' => '', 'orderby' => 'comment_date_gmt', 'order' => 'DESC', 'number' => '', 'offset' => '', 'post_id' => 0);
 184
 185	$args = wp_parse_args( $args, $defaults );
 186	extract( $args, EXTR_SKIP );
 187
 188	// $args can be whatever, only use the args defined in defaults to compute the key
 189	$key = md5( serialize( compact(array_keys($defaults)) )  );
 190	$last_changed = wp_cache_get('last_changed', 'comment');
 191	if ( !$last_changed ) {
 192		$last_changed = time();
 193		wp_cache_set('last_changed', $last_changed, 'comment');
 194	}
 195	$cache_key = "get_comments:$key:$last_changed";
 196
 197	if ( $cache = wp_cache_get( $cache_key, 'comment' ) ) {
 198		return $cache;
 199	}
 200
 201	$post_id = absint($post_id);
 202
 203	if ( 'hold' == $status )
 204		$approved = "comment_approved = '0'";
 205	elseif ( 'approve' == $status )
 206		$approved = "comment_approved = '1'";
 207	elseif ( 'spam' == $status )
 208		$approved = "comment_approved = 'spam'";
 209	else
 210		$approved = "( comment_approved = '0' OR comment_approved = '1' )";
 211
 212	$order = ( 'ASC' == $order ) ? 'ASC' : 'DESC';
 213
 214	$orderby = 'comment_date_gmt';  // Hard code for now
 215
 216	$number = absint($number);
 217	$offset = absint($offset);
 218
 219	if ( !empty($number) ) {
 220		if ( $offset )
 221			$number = 'LIMIT ' . $offset . ',' . $number;
 222		else
 223			$number = 'LIMIT ' . $number;
 224
 225	} else {
 226		$number = '';
 227	}
 228
 229	if ( ! empty($post_id) )
 230		$post_where = $wpdb->prepare( 'comment_post_ID = %d AND', $post_id );
 231	else
 232		$post_where = '';
 233
 234	$comments = $wpdb->get_results( "SELECT * FROM $wpdb->comments WHERE $post_where $approved ORDER BY $orderby $order $number" );
 235	wp_cache_add( $cache_key, $comments, 'comment' );
 236
 237	return $comments;
 238}
 239
 240/**
 241 * Retrieve all of the WordPress supported comment statuses.
 242 *
 243 * Comments have a limited set of valid status values, this provides the comment
 244 * status values and descriptions.
 245 *
 246 * @package WordPress
 247 * @subpackage Post
 248 * @since 2.7.0
 249 *
 250 * @return array List of comment statuses.
 251 */
 252function get_comment_statuses( ) {
 253	$status = array(
 254		'hold'		=> __('Unapproved'),
 255		'approve'	=> __('Approved'),
 256		'spam'		=> _c('Spam|adjective'),
 257	);
 258
 259	return $status;
 260}
 261
 262
 263/**
 264 * The date the last comment was modified.
 265 *
 266 * @since 1.5.0
 267 * @uses $wpdb
 268 * @global array $cache_lastcommentmodified
 269 *
 270 * @param string $timezone Which timezone to use in reference to 'gmt', 'blog',
 271 *		or 'server' locations.
 272 * @return string Last comment modified date.
 273 */
 274function get_lastcommentmodified($timezone = 'server') {
 275	global $cache_lastcommentmodified, $wpdb;
 276
 277	if ( isset($cache_lastcommentmodified[$timezone]) )
 278		return $cache_lastcommentmodified[$timezone];
 279
 280	$add_seconds_server = date('Z');
 281
 282	switch ( strtolower($timezone)) {
 283		case 'gmt':
 284			$lastcommentmodified = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1");
 285			break;
 286		case 'blog':
 287			$lastcommentmodified = $wpdb->get_var("SELECT comment_date FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1");
 288			break;
 289		case 'server':
 290			$lastcommentmodified = $wpdb->get_var($wpdb->prepare("SELECT DATE_ADD(comment_date_gmt, INTERVAL %s SECOND) FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1", $add_seconds_server));
 291			break;
 292	}
 293
 294	$cache_lastcommentmodified[$timezone] = $lastcommentmodified;
 295
 296	return $lastcommentmodified;
 297}
 298
 299/**
 300 * The amount of comments in a post or total comments.
 301 *
 302 * A lot like {@link wp_count_comments()}, in that they both return comment
 303 * stats (albeit with different types). The {@link wp_count_comments()} actual
 304 * caches, but this function does not.
 305 *
 306 * @since 2.0.0
 307 * @uses $wpdb
 308 *
 309 * @param int $post_id Optional. Comment amount in post if > 0, else total comments blog wide.
 310 * @return array The amount of spam, approved, awaiting moderation, and total comments.
 311 */
 312function get_comment_count( $post_id = 0 ) {
 313	global $wpdb;
 314
 315	$post_id = (int) $post_id;
 316
 317	$where = '';
 318	if ( $post_id > 0 ) {
 319		$where = $wpdb->prepare("WHERE comment_post_ID = %d", $post_id);
 320	}
 321
 322	$totals = (array) $wpdb->get_results("
 323		SELECT comment_approved, COUNT( * ) AS total
 324		FROM {$wpdb->comments}
 325		{$where}
 326		GROUP BY comment_approved
 327	", ARRAY_A);
 328
 329	$comment_count = array(
 330		"approved"              => 0,
 331		"awaiting_moderation"   => 0,
 332		"spam"                  => 0,
 333		"total_comments"        => 0
 334	);
 335
 336	foreach ( $totals as $row ) {
 337		switch ( $row['comment_approved'] ) {
 338			case 'spam':
 339				$comment_count['spam'] = $row['total'];
 340				$comment_count["total_comments"] += $row['total'];
 341				break;
 342			case 1:
 343				$comment_count['approved'] = $row['total'];
 344				$comment_count['total_comments'] += $row['total'];
 345				break;
 346			case 0:
 347				$comment_count['awaiting_moderation'] = $row['total'];
 348				$comment_count['total_comments'] += $row['total'];
 349				break;
 350			default:
 351				break;
 352		}
 353	}
 354
 355	return $comment_count;
 356}
 357
 358/**
 359 * Sanitizes the cookies sent to the user already.
 360 *
 361 * Will only do anything if the cookies have already been created for the user.
 362 * Mostly used after cookies had been sent to use elsewhere.
 363 *
 364 * @since 2.0.4
 365 */
 366function sanitize_comment_cookies() {
 367	if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) ) {
 368		$comment_author = apply_filters('pre_comment_author_name', $_COOKIE['comment_author_'.COOKIEHASH]);
 369		$comment_author = stripslashes($comment_author);
 370		$comment_author = attribute_escape($comment_author);
 371		$_COOKIE['comment_author_'.COOKIEHASH] = $comment_author;
 372	}
 373
 374	if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) ) {
 375		$comment_author_email = apply_filters('pre_comment_author_email', $_COOKIE['comment_author_email_'.COOKIEHASH]);
 376		$comment_author_email = stripslashes($comment_author_email);
 377		$comment_author_email = attribute_escape($comment_author_email);
 378		$_COOKIE['comment_author_email_'.COOKIEHASH] = $comment_author_email;
 379	}
 380
 381	if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) ) {
 382		$comment_author_url = apply_filters('pre_comment_author_url', $_COOKIE['comment_author_url_'.COOKIEHASH]);
 383		$comment_author_url = stripslashes($comment_author_url);
 384		$_COOKIE['comment_author_url_'.COOKIEHASH] = $comment_author_url;
 385	}
 386}
 387
 388/**
 389 * Validates whether this comment is allowed to be made or not.
 390 *
 391 * @since 2.0.0
 392 * @uses $wpdb
 393 * @uses apply_filters() Calls 'pre_comment_approved' hook on the type of comment
 394 * @uses do_action() Calls 'check_comment_flood' hook on $comment_author_IP, $comment_author_email, and $comment_date_gmt
 395 *
 396 * @param array $commentdata Contains information on the comment
 397 * @return mixed Signifies the approval status (0|1|'spam')
 398 */
 399function wp_allow_comment($commentdata) {
 400	global $wpdb;
 401	extract($commentdata, EXTR_SKIP);
 402
 403	// Simple duplicate check
 404	// expected_slashed ($comment_post_ID, $comment_author, $comment_author_email, $comment_content)
 405	$dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND ( comment_author = '$comment_author' ";
 406	if ( $comment_author_email )
 407		$dupe .= "OR comment_author_email = '$comment_author_email' ";
 408	$dupe .= ") AND comment_content = '$comment_content' LIMIT 1";
 409	if ( $wpdb->get_var($dupe) ) {
 410		if ( defined('DOING_AJAX') )
 411			die( __('Duplicate comment detected; it looks as though you\'ve already said that!') );
 412
 413		wp_die( __('Duplicate comment detected; it looks as though you\'ve already said that!') );
 414	}
 415
 416	do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt );
 417
 418	if ( $user_id ) {
 419		$userdata = get_userdata($user_id);
 420		$user = new WP_User($user_id);
 421		$post_author = $wpdb->get_var($wpdb->prepare("SELECT post_author FROM $wpdb->posts WHERE ID = %d LIMIT 1", $comment_post_ID));
 422	}
 423
 424	if ( isset($userdata) && ( $user_id == $post_author || $user->has_cap('moderate_comments') ) ) {
 425		// The author and the admins get respect.
 426		$approved = 1;
 427	 } else {
 428		// Everyone else's comments will be checked.
 429		if ( check_comment($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent, $comment_type) )
 430			$approved = 1;
 431		else
 432			$approved = 0;
 433		if ( wp_blacklist_check($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent) )
 434			$approved = 'spam';
 435	}
 436
 437	$approved = apply_filters('pre_comment_approved', $approved);
 438	return $approved;
 439}
 440
 441/**
 442 * Check whether comment flooding is occurring.
 443 *
 444 * Won't run, if current user can manage options, so to not block
 445 * administrators.
 446 *
 447 * @since 2.3.0
 448 * @uses $wpdb
 449 * @uses apply_filters() Calls 'comment_flood_filter' filter with first
 450 *		parameter false, last comment timestamp, new comment timestamp.
 451 * @uses do_action() Calls 'comment_flood_trigger' action with parameters with
 452 *		last comment timestamp and new comment timestamp.
 453 *
 454 * @param string $ip Comment IP.
 455 * @param string $email Comment author email address.
 456 * @param string $date MySQL time string.
 457 */
 458function check_comment_flood_db( $ip, $email, $date ) {
 459	global $wpdb;
 460	if ( current_user_can( 'manage_options' ) )
 461		return; // don't throttle admins
 462	if ( $lasttime = $wpdb->get_var( $wpdb->prepare("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_author_IP = %s OR comment_author_email = %s ORDER BY comment_date DESC LIMIT 1", $ip, $email) ) ) {
 463		$time_lastcomment = mysql2date('U', $lasttime);
 464		$time_newcomment  = mysql2date('U', $date);
 465		$flood_die = apply_filters('comment_flood_filter', false, $time_lastcomment, $time_newcomment);
 466		if ( $flood_die ) {
 467			do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
 468
 469			if ( defined('DOING_AJAX') )
 470				die( __('You are posting comments too quickly.  Slow down.') );
 471
 472			wp_die( __('You are posting comments too quickly.  Slow down.'), '', array('response' => 403) );
 473		}
 474	}
 475}
 476
 477/**
 478 * Separates an array of comments into an array keyed by comment_type.
 479 *
 480 * @since 2.7.0
 481 *
 482 * @param array $comments Array of comments
 483 * @return array Array of comments keyed by comment_type.
 484 */
 485function &separate_comments(&$comments) {
 486	$comments_by_type = array('comment' => array(), 'trackback' => array(), 'pingback' => array(), 'pings' => array());
 487	$count = count($comments);
 488	for ( $i = 0; $i < $count; $i++ ) {
 489		$type = $comments[$i]->comment_type;
 490		if ( empty($type) )
 491			$type = 'comment';
 492		$comments_by_type[$type][] = &$comments[$i];
 493		if ( 'trackback' == $type || 'pingback' == $type )
 494			$comments_by_type['pings'][] = &$comments[$i];
 495	}
 496
 497	return $comments_by_type;
 498}
 499
 500/**
 501 * Calculate the total number of comment pages.
 502 *
 503 * @since 2.7.0
 504 * @uses get_query_var() Used to fill in the default for $per_page parameter.
 505 * @uses get_option() Used to fill in defaults for parameters.
 506 * @uses Walker_Comment
 507 *
 508 * @param array $comments Optional array of comment objects.  Defaults to $wp_query->comments
 509 * @param int $per_page Optional comments per page.
 510 * @param boolean $threaded Optional control over flat or threaded comments.
 511 * @return int Number of comment pages.
 512 */
 513function get_comment_pages_count( $comments = null, $per_page = null, $threaded = null ) {
 514	global $wp_query;
 515
 516	if ( null === $comments && null === $per_page && null === $threaded && !empty($wp_query->max_num_comment_pages) )
 517		return $wp_query->max_num_comment_pages;
 518
 519	if ( !$comments || !is_array($comments) )
 520		$comments = $wp_query->comments;
 521
 522	if ( empty($comments) )
 523		return 0;
 524
 525	if ( !isset($per_page) )
 526		$per_page = (int) get_query_var('comments_per_page');
 527	if ( 0 === $per_page )
 528		$per_page = (int) get_option('comments_per_page');
 529	if ( 0 === $per_page )
 530		return 1;
 531
 532	if ( !isset($threaded) )
 533		$threaded = get_option('thread_comments');
 534
 535	if ( $threaded ) {
 536		$walker = new Walker_Comment;
 537		$count = ceil( $walker->get_number_of_root_elements( $comments ) / $per_page );
 538	} else {
 539		$count = ceil( count( $comments ) / $per_page );
 540	}
 541
 542	return $count;
 543}
 544
 545/**
 546 * Calculate what page number a comment will appear on for comment paging.
 547 *
 548 * @since 2.7.0
 549 * @uses get_comment() Gets the full comment of the $comment_ID parameter.
 550 * @uses get_option() Get various settings to control function and defaults.
 551 * @uses get_page_of_comment() Used to loop up to top level comment.
 552 *
 553 * @param int $comment_ID Comment ID.
 554 * @param array $args Optional args.
 555 * @return int|null Comment page number or null on error.
 556 */
 557function get_page_of_comment( $comment_ID, $args = array() ) {
 558	global $wpdb;
 559
 560	if ( !$comment = get_comment( $comment_ID ) )
 561		return;
 562
 563	$defaults = array( 'type' => 'all', 'page' => '', 'per_page' => '', 'max_depth' => '' );
 564	$args = wp_parse_args( $args, $defaults );
 565
 566	if ( '' === $args['per_page'] && get_option('page_comments') )
 567		$args['per_page'] = get_query_var('comments_per_page');
 568	if ( empty($args['per_page']) ) {
 569		$args['per_page'] = 0;
 570		$args['page'] = 0;
 571	}
 572	if ( $args['per_page'] < 1 )
 573		return 1;
 574
 575	if ( '' === $args['max_depth'] ) {
 576		if ( get_option('thread_comments') )
 577			$args['max_depth'] = get_option('thread_comments_depth');
 578		else
 579			$args['max_depth'] = -1;
 580	}
 581
 582	// Find this comment's top level parent if threading is enabled
 583	if ( $args['max_depth'] > 1 && 0 != $comment->comment_parent )
 584		return get_page_of_comment( $comment->comment_parent, $args );
 585
 586	$allowedtypes = array(
 587		'comment' => '',
 588		'pingback' => 'pingback',
 589		'trackback' => 'trackback',
 590	);
 591
 592	$comtypewhere = ( 'all' != $args['type'] && isset($allowedtypes[$args['type']]) ) ? " AND comment_type = '" . $allowedtypes[$args['type']] . "'" : '';
 593
 594	// Count comments older than this one
 595	$oldercoms = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(comment_ID) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_parent = 0 AND comment_approved = '1' AND comment_date_gmt < '%s'" . $comtypewhere, $comment->comment_post_ID, $comment->comment_date_gmt ) );
 596
 597	// No older comments? Then it's page #1.
 598	if ( 0 == $oldercoms )
 599		return 1;
 600
 601	// Divide comments older than this one by comments per page to get this comment's page number
 602	return ceil( ( $oldercoms + 1 ) / $args['per_page'] );
 603}
 604
 605/**
 606 * Does comment contain blacklisted characters or words.
 607 *
 608 * @since 1.5.0
 609 * @uses do_action() Calls 'wp_blacklist_check' hook for all parameters.
 610 *
 611 * @param string $author The author of the comment
 612 * @param string $email The email of the comment
 613 * @param string $url The url used in the comment
 614 * @param string $comment The comment content
 615 * @param string $user_ip The comment author IP address
 616 * @param string $user_agent The author's browser user agent
 617 * @return bool True if comment contains blacklisted content, false if comment does not
 618 */
 619function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) {
 620	do_action('wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent);
 621
 622	if ( preg_match_all('/&#(\d+);/', $comment . $author . $url, $chars) ) {
 623		foreach ( (array) $chars[1] as $char ) {
 624			// If it's an encoded char in the normal ASCII set, reject
 625			if ( 38 == $char )
 626				continue; // Unless it's &
 627			if ( $char < 128 )
 628				return true;
 629		}
 630	}
 631
 632	$mod_keys = trim( get_option('blacklist_keys') );
 633	if ( '' == $mod_keys )
 634		return false; // If moderation keys are empty
 635	$words = explode("\n", $mod_keys );
 636
 637	foreach ( (array) $words as $word ) {
 638		$word = trim($word);
 639
 640		// Skip empty lines
 641		if ( empty($word) ) { continue; }
 642
 643		// Do some escaping magic so that '#' chars in the
 644		// spam words don't break things:
 645		$word = preg_quote($word, '#');
 646
 647		$pattern = "#$word#i";
 648		if (
 649			   preg_match($pattern, $author)
 650			|| preg_match($pattern, $email)
 651			|| preg_match($pattern, $url)
 652			|| preg_match($pattern, $comment)
 653			|| preg_match($pattern, $user_ip)
 654			|| preg_match($pattern, $user_agent)
 655		 )
 656			return true;
 657	}
 658	return false;
 659}
 660
 661/**
 662 * Retrieve total comments for blog or single post.
 663 *
 664 * The properties of the returned object contain the 'moderated', 'approved',
 665 * and spam comments for either the entire blog or single post. Those properties
 666 * contain the amount of comments that match the status. The 'total_comments'
 667 * property contains the integer of total comments.
 668 *
 669 * The comment stats are cached and then retrieved, if they already exist in the
 670 * cache.
 671 *
 672 * @since 2.5.0
 673 *
 674 * @param int $post_id Optional. Post ID.
 675 * @return object Comment stats.
 676 */
 677function wp_count_comments( $post_id = 0 ) {
 678	global $wpdb;
 679
 680	$post_id = (int) $post_id;
 681
 682	$stats = apply_filters('wp_count_comments', array(), $post_id);
 683	if ( !empty($stats) )
 684		return $stats;
 685
 686	$count = wp_cache_get("comments-{$post_id}", 'counts');
 687
 688	if ( false !== $count )
 689		return $count;
 690
 691	$where = '';
 692	if( $post_id > 0 )
 693		$where = $wpdb->prepare( "WHERE comment_post_ID = %d", $post_id );
 694
 695	$count = $wpdb->get_results( "SELECT comment_approved, COUNT( * ) AS num_comments FROM {$wpdb->comments} {$where} GROUP BY comment_approved", ARRAY_A );
 696
 697	$total = 0;
 698	$approved = array('0' => 'moderated', '1' => 'approved', 'spam' => 'spam');
 699	$known_types = array_keys( $approved );
 700	foreach( (array) $count as $row_num => $row ) {
 701		$total += $row['num_comments'];
 702		if ( in_array( $row['comment_approved'], $known_types ) )
 703			$stats[$approved[$row['comment_approved']]] = $row['num_comments'];
 704	}
 705
 706	$stats['total_comments'] = $total;
 707	foreach ( $approved as $key ) {
 708		if ( empty($stats[$key]) )
 709			$stats[$key] = 0;
 710	}
 711
 712	$stats = (object) $stats;
 713	wp_cache_set("comments-{$post_id}", $stats, 'counts');
 714
 715	return $stats;
 716}
 717
 718/**
 719 * Removes comment ID and maybe updates post comment count.
 720 *
 721 * The post comment count will be updated if the comment was approved and has a
 722 * post ID available.
 723 *
 724 * @since 2.0.0
 725 * @uses $wpdb
 726 * @uses do_action() Calls 'delete_comment' hook on comment ID
 727 * @uses do_action() Calls 'wp_set_comment_status' hook on comment ID with 'delete' set for the second parameter
 728 * @uses wp_transition_comment_status() Passes new and old comment status along with $comment object
 729 *
 730 * @param int $comment_id Comment ID
 731 * @return bool False if delete comment query failure, true on success.
 732 */
 733function wp_delete_comment($comment_id) {
 734	global $wpdb;
 735	do_action('delete_comment', $comment_id);
 736
 737	$comment = get_comment($comment_id);
 738
 739	if ( ! $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment_id) ) )
 740		return false;
 741
 742	$post_id = $comment->comment_post_ID;
 743	if ( $post_id && $comment->comment_approved == 1 )
 744		wp_update_comment_count($post_id);
 745
 746	clean_comment_cache($comment_id);
 747
 748	do_action('wp_set_comment_status', $comment_id, 'delete');
 749	wp_transition_comment_status('delete', $comment->comment_approved, $comment);
 750	return true;
 751}
 752
 753/**
 754 * The status of a comment by ID.
 755 *
 756 * @since 1.0.0
 757 *
 758 * @param int $comment_id Comment ID
 759 * @return string|bool Status might be 'deleted', 'approved', 'unapproved', 'spam'. False on failure.
 760 */
 761function wp_get_comment_status($comment_id) {
 762	$comment = get_comment($comment_id);
 763	if ( !$comment )
 764		return false;
 765
 766	$approved = $comment->comment_approved;
 767
 768	if ( $approved == NULL )
 769		return 'deleted';
 770	elseif ( $approved == '1' )
 771		return 'approved';
 772	elseif ( $approved == '0' )
 773		return 'unapproved';
 774	elseif ( $approved == 'spam' )
 775		return 'spam';
 776	else
 777		return false;
 778}
 779
 780/**
 781 * Call hooks for when a comment status transition occurs.
 782 *
 783 * Calls hooks for comment status transitions. If the new comment status is not the same
 784 * as the previous comment status, then two hooks will be ran, the first is
 785 * 'transition_comment_status' with new status, old status, and comment data. The
 786 * next action called is 'comment_OLDSTATUS_to_NEWSTATUS' the NEWSTATUS is the
 787 * $new_status parameter and the OLDSTATUS is $old_status parameter; it has the
 788 * comment data.
 789 *
 790 * The final action will run whether or not the comment statuses are the same. The
 791 * action is named 'comment_NEWSTATUS_COMMENTTYPE', NEWSTATUS is from the $new_status
 792 * parameter and COMMENTTYPE is comment_type comment data.
 793 *
 794 * @since 2.7.0
 795 *
 796 * @param string $new_status New comment status.
 797 * @param string $old_status Previous comment status.
 798 * @param object $comment Comment data.
 799 */
 800function wp_transition_comment_status($new_status, $old_status, $comment) {
 801	// Translate raw statuses to human readable formats for the hooks
 802	// This is not a complete list of comment status, it's only the ones that need to be renamed
 803	$comment_statuses = array(
 804		0         => 'unapproved',
 805		'hold'    => 'unapproved', // wp_set_comment_status() uses "hold"
 806		1         => 'approved',
 807		'approve' => 'approved', // wp_set_comment_status() uses "approve"
 808	);
 809	if ( isset($comment_statuses[$new_status]) ) $new_status = $comment_statuses[$new_status];
 810	if ( isset($comment_statuses[$old_status]) ) $old_status = $comment_statuses[$old_status];
 811
 812	// Call the hooks
 813	if ( $new_status != $old_status ) {
 814		do_action('transition_comment_status', $new_status, $old_status, $comment);
 815		do_action("comment_${old_status}_to_$new_status", $comment);
 816	}
 817	do_action("comment_${new_status}_$comment->comment_type", $comment->comment_ID, $comment);
 818}
 819
 820/**
 821 * Get current commenter's name, email, and URL.
 822 *
 823 * Expects cookies content to already be sanitized. User of this function might
 824 * wish to recheck the returned array for validity.
 825 *
 826 * @see sanitize_comment_cookies() Use to sanitize cookies
 827 *
 828 * @since 2.0.4
 829 *
 830 * @return array Comment author, email, url respectively.
 831 */
 832function wp_get_current_commenter() {
 833	// Cookies should already be sanitized.
 834
 835	$comment_author = '';
 836	if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) )
 837		$comment_author = $_COOKIE['comment_author_'.COOKIEHASH];
 838
 839	$comment_author_email = '';
 840	if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) )
 841		$comment_author_email = $_COOKIE['comment_author_email_'.COOKIEHASH];
 842
 843	$comment_author_url = '';
 844	if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) )
 845		$comment_author_url = $_COOKIE['comment_author_url_'.COOKIEHASH];
 846
 847	return compact('comment_author', 'comment_author_email', 'comment_author_url');
 848}
 849
 850/**
 851 * Inserts a comment to the database.
 852 *
 853 * The available comment data key names are 'comment_author_IP', 'comment_date',
 854 * 'comment_date_gmt', 'comment_parent', 'comment_approved', and 'user_id'.
 855 *
 856 * @since 2.0.0
 857 * @uses $wpdb
 858 *
 859 * @param array $commentdata Contains information on the comment.
 860 * @return int The new comment's ID.
 861 */
 862function wp_insert_comment($commentdata) {
 863	global $wpdb;
 864	extract(stripslashes_deep($commentdata), EXTR_SKIP);
 865
 866	if ( ! isset($comment_author_IP) )
 867		$comment_author_IP = '';
 868	if ( ! isset($comment_date) )
 869		$comment_date = current_time('mysql');
 870	if ( ! isset($comment_date_gmt) )
 871		$comment_date_gmt = get_gmt_from_date($comment_date);
 872	if ( ! isset($comment_parent) )
 873		$comment_parent = 0;
 874	if ( ! isset($comment_approved) )
 875		$comment_approved = 1;
 876	if ( ! isset($user_id) )
 877		$user_id = 0;
 878	if ( ! isset($comment_type) )
 879		$comment_type = '';
 880
 881	$result = $wpdb->query( $wpdb->prepare("INSERT INTO $wpdb->comments
 882	(comment_post_ID, comment_author, comment_author_email, comment_author_url, comment_author_IP, comment_date, comment_date_gmt, comment_content, comment_approved, comment_agent, comment_type, comment_parent, user_id)
 883	VALUES (%d, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %d, %d)",
 884	$comment_post_ID, $comment_author, $comment_author_email, $comment_author_url, $comment_author_IP, $comment_date, $comment_date_gmt, $comment_content, $comment_approved, $comment_agent, $comment_type, $comment_parent, $user_id) );
 885
 886	$id = (int) $wpdb->insert_id;
 887
 888	if ( $comment_approved == 1)
 889		wp_update_comment_count($comment_post_ID);
 890
 891	return $id;
 892}
 893
 894/**
 895 * Filters and sanitizes comment data.
 896 *
 897 * Sets the comment data 'filtered' field to true when finished. This can be
 898 * checked as to whether the comment should be filtered and to keep from
 899 * filtering the same comment more than once.
 900 *
 901 * @since 2.0.0
 902 * @uses apply_filters() Calls 'pre_user_id' hook on comment author's user ID
 903 * @uses apply_filters() Calls 'pre_comment_user_agent' hook on comment author's user agent
 904 * @uses apply_filters() Calls 'pre_comment_author_name' hook on comment author's name
 905 * @uses apply_filters() Calls 'pre_comment_content' hook on the comment's content
 906 * @uses apply_filters() Calls 'pre_comment_user_ip' hook on comment author's IP
 907 * @uses apply_filters() Calls 'pre_comment_author_url' hook on comment author's URL
 908 * @uses apply_filters() Calls 'pre_comment_author_email' hook on comment author's email address
 909 *
 910 * @param array $commentdata Contains information on the comment.
 911 * @return array Parsed comment information.
 912 */
 913function wp_filter_comment($commentdata) {
 914	$commentdata['user_id']              = apply_filters('pre_user_id', $commentdata['user_ID']);
 915	$commentdata['comment_agent']        = apply_filters('pre_comment_user_agent', $commentdata['comment_agent']);
 916	$commentdata['comment_author']       = apply_filters('pre_comment_author_name', $commentdata['comment_author']);
 917	$commentdata['comment_content']      = apply_filters('pre_comment_content', $commentdata['comment_content']);
 918	$commentdata['comment_author_IP']    = apply_filters('pre_comment_user_ip', $commentdata['comment_author_IP']);
 919	$commentdata['comment_author_url']   = apply_filters('pre_comment_author_url', $commentdata['comment_author_url']);
 920	$commentdata['comment_author_email'] = apply_filters('pre_comment_author_email', $commentdata['comment_author_email']);
 921	$commentdata['filtered'] = true;
 922	return $commentdata;
 923}
 924
 925/**
 926 * Whether comment should be blocked because of comment flood.
 927 *
 928 * @since 2.1.0
 929 *
 930 * @param bool $block Whether plugin has already blocked comment.
 931 * @param int $time_lastcomment Timestamp for last comment.
 932 * @param int $time_newcomment Timestamp for new comment.
 933 * @return bool Whether comment should be blocked.
 934 */
 935function wp_throttle_comment_flood($block, $time_lastcomment, $time_newcomment) {
 936	if ( $block ) // a plugin has already blocked... we'll let that decision stand
 937		return $block;
 938	if ( ($time_newcomment - $time_lastcomment) < 15 )
 939		return true;
 940	return false;
 941}
 942
 943/**
 944 * Adds a new comment to the database.
 945 *
 946 * Filters new comment to ensure that the fields are sanitized and valid before
 947 * inserting comment into database. Calls 'comment_post' action with comment ID
 948 * and whether comment is approved by WordPress. Also has 'preprocess_comment'
 949 * filter for processing the comment data before the function handles it.
 950 *
 951 * @since 1.5.0
 952 * @uses apply_filters() Calls 'preprocess_comment' hook on $commentdata parameter array before processing
 953 * @uses do_action() Calls 'comment_post' hook on $comment_ID returned from adding the comment and if the comment was approved.
 954 * @uses wp_filter_comment() Used to filter comment before adding comment.
 955 * @uses wp_allow_comment() checks to see if comment is approved.
 956 * @uses wp_insert_comment() Does the actual comment insertion to the database.
 957 *
 958 * @param array $commentdata Contains information on the comment.
 959 * @return int The ID of the comment after adding.
 960 */
 961function wp_new_comment( $commentdata ) {
 962	$commentdata = apply_filters('preprocess_comment', $commentdata);
 963
 964	$commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID'];
 965	$commentdata['user_ID']         = (int) $commentdata['user_ID'];
 966
 967	$commentdata['comment_parent'] = absint($commentdata['comment_parent']);
 968	$parent_status = ( 0 < $commentdata['comment_parent'] ) ? wp_get_comment_status($commentdata['comment_parent']) : '';
 969	$commentdata['comment_parent'] = ( 'approved' == $parent_status || 'unapproved' == $parent_status ) ? $commentdata['comment_parent'] : 0;
 970
 971	$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '',$_SERVER['REMOTE_ADDR'] );
 972	$commentdata['comment_agent']     = $_SERVER['HTTP_USER_AGENT'];
 973
 974	$commentdata['comment_date']     = current_time('mysql');
 975	$commentdata['comment_date_gmt'] = current_time('mysql', 1);
 976
 977	$commentdata = wp_filter_comment($commentdata);
 978
 979	$commentdata['comment_approved'] = wp_allow_comment($commentdata);
 980
 981	$comment_ID = wp_insert_comment($commentdata);
 982
 983	do_action('comment_post', $comment_ID, $commentdata['comment_approved']);
 984
 985	if ( 'spam' !== $commentdata['comment_approved'] ) { // If it's spam save it silently for later crunching
 986		if ( '0' == $commentdata['comment_approved'] )
 987			wp_notify_moderator($comment_ID);
 988
 989		$post = &get_post($commentdata['comment_post_ID']); // Don't notify if it's your own comment
 990
 991		if ( get_option('comments_notify') && $commentdata['comment_approved'] && $post->post_author != $commentdata['user_ID'] )
 992			wp_notify_postauthor($comment_ID, $commentdata['comment_type']);
 993	}
 994
 995	return $comment_ID;
 996}
 997
 998/**
 999 * Sets the status of a comment.
1000 *
1001 * The 'wp_set_comment_status' action is called after the comment is handled and
1002 * will only be called, if the comment status is either 'hold', 'approve', or
1003 * 'spam'. If the comment status is not in the list, then false is returned and
1004 * if the status is 'delete', then the comment is deleted without calling the
1005 * action.
1006 *
1007 * @since 1.0.0
1008 * @uses wp_transition_comment_status() Passes new and old comment status along with $comment object
1009 *
1010 * @param int $comment_id Comment ID.
1011 * @param string $comment_status New comment status, either 'hold', 'approve', 'spam', or 'delete'.
1012 * @return bool False on failure or deletion and true on success.
1013 */
1014function wp_set_comment_status($comment_id, $comment_status) {
1015	global $wpdb;
1016
1017	switch ( $comment_status ) {
1018		case 'hold':
1019			$query = $wpdb->prepare("UPDATE $wpdb->comments SET comment_approved='0' WHERE comment_ID = %d LIMIT 1", $comment_id);
1020			break;
1021		case 'approve':
1022			$query = $wpdb->prepare("UPDATE $wpdb->comments SET comment_approved='1' WHERE comment_ID = %d LIMIT 1", $comment_id);
1023			if ( get_option('comments_notify') ) {
1024				$comment = get_comment($comment_id);
1025				wp_notify_postauthor($comment_id, $comment->comment_type);
1026			}
1027			break;
1028		case 'spam':
1029			$query = $wpdb->prepare("UPDATE $wpdb->comments SET comment_approved='spam' WHERE comment_ID = %d LIMIT 1", $comment_id);
1030			break;
1031		case 'delete':
1032			return wp_delete_comment($comment_id);
1033			break;
1034		default:
1035			return false;
1036	}
1037
1038	if ( !$wpdb->query($query) )
1039		return false;
1040
1041	clean_comment_cache($comment_id);
1042
1043	$comment = get_comment($comment_id);
1044
1045	do_action('wp_set_comment_status', $comment_id, $comment_status);
1046	wp_transition_comment_status($comment_status, $comment->comment_approved, $comment);
1047
1048	wp_update_comment_count($comment->comment_post_ID);
1049
1050	return true;
1051}
1052
1053/**
1054 * Updates an existing comment in the database.
1055 *
1056 * Filters the comment and makes sure certain fields are valid before updating.
1057 *
1058 * @since 2.0.0
1059 * @uses $wpdb
1060 * @uses wp_transition_comment_status() Passes new and old comment status along with $comment object
1061 *
1062 * @param array $commentarr Contains information on the comment.
1063 * @return int Comment was updated if value is 1, or was not updated if value is 0.
1064 */
1065function wp_update_comment($commentarr) {
1066	global $wpdb;
1067
1068	// First, get all of the original fields
1069	$comment = get_comment($commentarr['comment_ID'], ARRAY_A);
1070
1071	// Escape data pulled from DB.
1072	foreach ( (array) $comment as $key => $value )
1073		$comment[$key] = $wpdb->escape($value);
1074
1075	// Merge old and new fields with new fields overwriting old ones.
1076	$commentarr = array_merge($comment, $commentarr);
1077
1078	$commentarr = wp_filter_comment( $commentarr );
1079
1080	// Now extract the merged array.
1081	extract(stripslashes_deep($commentarr), EXTR_SKIP);
1082
1083	$comment_content = apply_filters('comment_save_pre', $comment_content);
1084
1085	$comment_date_gmt = get_gmt_from_date($comment_date);
1086
1087	if ( !isset($comment_approved) )
1088		$comment_approved = 1;
1089	else if ( 'hold' == $comment_approved )
1090		$comment_approved = 0;
1091	else if ( 'approve' == $comment_approved )
1092		$comment_approved = 1;
1093
1094	$wpdb->query( $wpdb->prepare("UPDATE $wpdb->comments SET
1095			comment_content      = %s,
1096			comment_author       = %s,
1097			comment_author_email = %s,
1098			comment_approved     = %s,
1099			comment_author_url   = %s,
1100			comment_date         = %s,
1101			comment_date_gmt     = %s
1102		WHERE comment_ID = %d",
1103			$comment_content,
1104			$comment_author,
1105			$comment_author_email,
1106			$comment_approved,
1107			$comment_author_url,
1108			$comment_date,
1109			$comment_date_gmt,
1110			$comment_ID) );
1111
1112	$rval = $wpdb->rows_affected;
1113
1114	clean_comment_cache($comment_ID);
1115	wp_update_comment_count($comment_post_ID);
1116	do_action('edit_comment', $comment_ID);
1117	$comment = get_comment($comment_ID);
1118	wp_transition_comment_status($comment_approved, $comment->comment_approved, $comment);
1119	return $rval;
1120}
1121
1122/**
1123 * Whether to defer comment counting.
1124 *
1125 * When setting $defer to true, all post comment counts will not be updated
1126 * until $defer is set to false. When $defer is set to false, then all
1127 * previously deferred updated post comment counts will then be automatically
1128 * updated without having to call wp_update_comment_count() after.
1129 *
1130 * @since 2.5.0
1131 * @staticvar bool $_defer
1132 *
1133 * @param bool $defer
1134 * @return unknown
1135 */
1136function wp_defer_comment_counting($defer=null) {
1137	static $_defer = false;
1138
1139	if ( is_bool($defer) ) {
1140		$_defer = $defer;
1141		// flush any deferred counts
1142		if ( !$defer )
1143			wp_update_comment_count( null, true );
1144	}
1145
1146	return $_defer;
1147}
1148
1149/**
1150 * Updates the comment count for post(s).
1151 *
1152 * When $do_deferred is false (is by default) and the comments have been set to
1153 * be deferred, the post_id will be added to a queue, which will be updated at a
1154 * later date and only updated once per post ID.
1155 *
1156 * If the comments have not be set up to be deferred, then the post will be
1157 * updated. When $do_deferred is set to true, then all previous deferred post
1158 * IDs will be updated along with the current $post_id.
1159 *
1160 * @since 2.1.0
1161 * @see wp_update_comment_count_now() For what could cause a false return value
1162 *
1163 * @param int $post_id Post ID
1164 * @param bool $do_deferred Whether to process previously deferred post comment counts
1165 * @return bool True on success, false on failure
1166 */
1167function wp_update_comment_count($post_id, $do_deferred=false) {
1168	static $_deferred = array();
1169
1170	if ( $do_deferred ) {
1171		$_deferred = array_unique($_deferred);
1172		foreach ( $_deferred as $i => $_post_id ) {
1173			wp_update_comment_count_now($_post_id);
1174			unset( $_deferred[$i] ); /** @todo Move this outside of the foreach and reset $_deferred to an array instead */
1175		}
1176	}
1177
1178	if ( wp_defer_comment_counting() ) {
1179		$_deferred[] = $post_id;
1180		return true;
1181	}
1182	elseif ( $post_id ) {
1183		return wp_update_comment_count_now($post_id);
1184	}
1185
1186}
1187
1188/**
1189 * Updates the comment count for the post.
1190 *
1191 * @since 2.5.0
1192 * @uses $wpdb
1193 * @uses do_action() Calls 'wp_update_comment_count' hook on $post_id, $new, and $old
1194 * @uses do_action() Calls 'edit_posts' hook on $post_id and $post
1195 *
1196 * @param int $post_id Post ID
1197 * @return bool False on '0' $post_id or if post with ID does not exist. True on success.
1198 */
1199function wp_update_comment_count_now($post_id) {
1200	global $wpdb;
1201	$post_id = (int) $post_id;
1202	if ( !$post_id )
1203		return false;
1204	if ( !$post = get_post($post_id) )
1205		return false;
1206
1207	$old = (int) $post->comment_count;
1208	$new = (int) $wpdb->get_var( $wpdb->prepare("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1'", $post_id) );
1209	$wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET comment_count = %d WHERE ID = %d", $new, $post_id) );
1210
1211	if ( 'page' == $post->post_type )
1212		clean_page_cache( $post_id );
1213	else
1214		clean_post_cache( $post_id );
1215
1216	do_action('wp_update_comment_count', $post_id, $new, $old);
1217	do_action('edit_post', $post_id, $post);
1218
1219	return true;
1220}
1221
1222//
1223// Ping and trackback functions.
1224//
1225
1226/**
1227 * Finds a pingback server URI based on the given URL.
1228 *
1229 * Checks the HTML for the rel="pingback" link and x-pingback headers. It does
1230 * a check for the x-pingback headers first and returns that, if available. The
1231 * check for the rel="pingback" has more overhead than just the header.
1232 *
1233 * @since 1.5.0
1234 *
1235 * @param string $url URL to ping.
1236 * @param int $deprecated Not Used.
1237 * @return bool|string False on failure, string containing URI on success.
1238 */
1239function discover_pingback_server_uri($url, $deprecated = 2048) {
1240
1241	$pingback_str_dquote = 'rel="pingback"';
1242	$pingback_str_squote = 'rel=\'pingback\'';
1243
1244	/** @todo Should use Filter Extension or custom preg_match instead. */
1245	$parsed_url = parse_url($url);
1246
1247	if ( ! isset( $parsed_url['host'] ) ) // Not an URL. This should never happen.
1248		return false;
1249
1250	$response = wp_remote_get( $url, array( 'timeout' => 2, 'httpversion' => '1.1' ) );
1251
1252	if ( is_wp_error( $response ) )
1253		return false;
1254
1255	if ( isset( $response['headers']['x-pingback'] ) )
1256		return $response['headers']['x-pingback'];
1257
1258	// Not an (x)html, sgml, or xml page, no use going further.
1259	if ( isset( $response['headers']['content-type'] ) && preg_match('#(image|audio|video|model)/#is', $response['headers']['content-type']) )
1260		return false;
1261
1262	$contents = $response['body'];
1263
1264	$pingback_link_offset_dquote = strpos($contents, $pingback_str_dquote);
1265	$pingback_link_offset_squote = strpos($contents, $pingback_str_squote);
1266	if ( $pingback_link_offset_dquote || $pingback_link_offset_squote ) {
1267		$quote = ($pingback_link_offset_dquote) ? '"' : '\'';
1268		$pingback_link_offset = ($quote=='"') ? $pingback_link_offset_dquote : $pingback_link_offset_squote;
1269		$pingback_href_pos = @strpos($contents, 'href=', $pingback_link_offset);
1270		$pingback_href_start = $pingback_href_pos+6;
1271		$pingback_href_end = @strpos($contents, $quote, $pingback_href_start);
1272		$pingback_server_url_len = $pingback_href_end - $pingback_href_start;
1273		$pingback_server_url = substr($contents, $pingback_href_start, $pingback_server_url_len);
1274
1275		// We may find rel="pingback" but an incomplete pingback URL
1276		if ( $pingback_server_url_len > 0 ) { // We got it!
1277			return $pingback_server_url;
1278		}
1279	}
1280
1281	return false;
1282}
1283
1284/**
1285 * Perform all pingbacks, enclosures, trackbacks, and send to pingback services.
1286 *
1287 * @since 2.1.0
1288 * @uses $wpdb
1289 */
1290function do_all_pings() {
1291	global $wpdb;
1292
1293	// Do pingbacks
1294	while ($ping = $wpdb->get_row("SELECT * FROM {$wpdb->posts}, {$wpdb->postmeta} WHERE {$wpdb->posts}.ID = {$wpdb->postmeta}.post_id AND {$wpdb->postmeta}.meta_key = '_pingme' LIMIT 1")) {
1295		$wpdb->query("DELETE FROM {$wpdb->postmeta} WHERE post_id = {$ping->ID} AND meta_key = '_pingme';");
1296		pingback($ping->post_content, $ping->ID);
1297	}
1298
1299	// Do Enclosures
1300	while ($enclosure = $wpdb->get_row("SELECT * FROM {$wpdb->posts}, {$wpdb->postmeta} WHERE {$wpdb->posts}.ID = {$wpdb->postmeta}.post_id AND {$wpdb->postmeta}.meta_key = '_encloseme' LIMIT 1")) {
1301		$wpdb->query( $wpdb->prepare("DELETE FROM {$wpdb->postmeta} WHERE post_id = %d AND meta_key = '_encloseme';", $enclosure->ID) );
1302		do_enclose($enclosure->post_content, $enclosure->ID);
1303	}
1304
1305	// Do Trackbacks
1306	$trackbacks = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE to_ping <> '' AND post_status = 'publish'");
1307	if ( is_array($trackbacks) )
1308		foreach ( $trackbacks as $trackback )
1309			do_trackbacks($trackback);
1310
1311	//Do Update Services/Generic Pings
1312	generic_ping();
1313}
1314
1315/**
1316 * Perform trackbacks.
1317 *
1318 * @since 1.5.0
1319 * @uses $wpdb
1320 *
1321 * @param int $post_id Post ID to do trackbacks on.
1322 */
1323function do_trackbacks($post_id) {
1324	global $wpdb;
1325
1326	$post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) );
1327	$to_ping = get_to_ping($post_id);
1328	$pinged  = get_pung($post_id);
1329	if ( empty($to_ping) ) {
1330		$wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET to_ping = '' WHERE ID = %d", $post_id) );
1331		return;
1332	}
1333
1334	if ( empty($post->post_excerpt) )
1335		$excerpt = apply_filters('the_content', $post->post_content);
1336	else
1337		$excerpt = apply_filters('the_excerpt', $post->post_excerpt);
1338	$excerpt = str_replace(']]>', ']]&gt;', $excerpt);
1339	$excerpt = wp_html_excerpt($excerpt, 252) . '...';
1340
1341	$post_title = apply_filters('the_title', $post->post_title);
1342	$post_title = strip_tags($post_title);
1343
1344	if ( $to_ping ) {
1345		foreach ( (array) $to_ping as $tb_ping ) {
1346			$tb_ping = trim($tb_ping);
1347			if ( !in_array($tb_ping, $pinged) ) {
1348				trackback($tb_ping, $post_title, $excerpt, $post_id);
1349				$pinged[] = $tb_ping;
1350			} else {
1351				$wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, '$tb_ping', '')) WHERE ID = %d", $post_id) );
1352			}
1353		}
1354	}
1355}
1356
1357/**
1358 * Sends pings to all of the ping site services.
1359 *
1360 * @since 1.2.0
1361 *
1362 * @param int $post_id Post ID. Not actually used.
1363 * @return int Same as Post ID from parameter
1364 */
1365function generic_ping($post_id = 0) {
1366	$services = get_option('ping_sites');
1367
1368	$services = explode("\n", $services);
1369	foreach ( (array) $services as $service ) {
1370		$service = trim($service);
1371		if ( '' != $service )
1372			weblog_ping($service);
1373	}
1374
1375	return $post_id;
1376}
1377
1378/**
1379 * Pings back the links found in a post.
1380 *
1381 * @since 0.71
1382 * @uses $wp_version
1383 * @uses IXR_Client
1384 *
1385 * @param string $content Post content to check for links.
1386 * @param int $post_ID Post ID.
1387 */
1388function pingback($content, $post_ID) {
1389	global $wp_version;
1390	include_once(ABSPATH . WPINC . '/class-IXR.php');
1391
1392	// original code by Mort (http://mort.mine.nu:8080)
1393	$post_links = array();
1394
1395	$pung = get_pung($post_ID);
1396
1397	// Variables
1398	$ltrs = '\w';
1399	$gunk = '/#~:.?+=&%@!\-';
1400	$punc = '.:?\-';
1401	$any = $ltrs . $gunk . $punc;
1402
1403	// Step 1
1404	// Parsing the post, external links (if any) are stored in the $post_links array
1405	// This regexp comes straight from phpfreaks.com
1406	// http://www.phpfreaks.com/quickcode/Extract_All_URLs_on_a_Page/15.php
1407	preg_match_all("{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp);
1408
1409	// Step 2.
1410	// Walking thru the links array
1411	// first we get rid of links pointing to sites, not to specific files
1412	// Example:
1413	// http://dummy-weblog.org
1414	// http://dummy-weblog.org/
1415	// http://dummy-weblog.org/post.php
1416	// We don't wanna ping first and second types, even if they have a valid <link/>
1417
1418	foreach ( (array) $post_links_temp[0] as $link_test ) :
1419		if ( !in_array($link_test, $pung) && (url_to_postid($link_test) != $post_ID) // If we haven't pung it already and it isn't a link to itself
1420				&& !is_local_attachment($link_test) ) : // Also, let's never ping local attachments.
1421			if ( $test = @parse_url($link_test) ) {
1422				if ( isset($test['query']) )
1423					$post_links[] = $link_test;
1424				elseif ( ($test['path'] != '/') && ($test['path'] != '') )
1425					$post_links[] = $link_test;
1426			}
1427		endif;
1428	endforeach;
1429
1430	do_action_ref_array('pre_ping', array(&$post_links, &$pung));
1431
1432	foreach ( (array) $post_links as $pagelinkedto ) {
1433		$pingback_server_url = discover_pingback_server_uri($pagelinkedto, 2048);
1434
1435		if ( $pingback_server_url ) {
1436			@ set_time_limit( 60 );
1437			 // Now, the RPC call
1438			$pagelinkedfrom = get_permalink($post_ID);
1439
1440			// using a timeout of 3 seconds should be enough to cover slow servers
1441			$client = new IXR_Client($pingback_server_url);
1442			$client->timeout = 3;
1443			$client->useragent .= ' -- WordPress/' . $wp_version;
1444
1445			// when set to true, this outputs debug messages by itself
1446			$client->debug = false;
1447
1448			if ( $client->query('pingback.ping', $pagelinkedfrom, $pagelinkedto) || ( isset($client->error->code) && 48 == $client->error->code ) ) // Already registered
1449				add_ping( $post_ID, $pagelinkedto );
1450		}
1451	}
1452}
1453
1454/**
1455 * Check whether blog is public before returning sites.
1456 *
1457 * @since 2.1.0
1458 *
1459 * @param mixed $sites Will return if blog is public, will not return if not public.
1460 * @return mixed Empty string if blog is not public, returns $sites, if site is public.
1461 */
1462function privacy_ping_filter($sites) {
1463	if ( '0' != get_option('blog_public') )
1464		return $sites;
1465	else
1466		return '';
1467}
1468
1469/**
1470 * Send a Trackback.
1471 *
1472 * Updates database when sending trackback to prevent duplicates.
1473 *
1474 * @since 0.71
1475 * @uses $wpdb
1476 *
1477 * @param string $trackback_url URL to send trackbacks.
1478 * @param string $title Title of post.
1479 * @param string $excerpt Excerpt of post.
1480 * @param int $ID Post ID.
1481 * 

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