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WordPress/wp-includes/comment.php

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<?php
/**
* Manages WordPress comments
*
* @package WordPress
* @subpackage Comment
*/
/**
* Checks whether a comment passes internal checks to be allowed to add.
*
* If comment moderation is set in the administration, then all comments,
* regardless of their type and whitelist will be set to false. If the number of
* links exceeds the amount in the administration, then the check fails. If any
* of the parameter contents match the blacklist of words, then the check fails.
*
* If the number of links exceeds the amount in the administration, then the
* check fails. If any of the parameter contents match the blacklist of words,
* then the check fails.
*
* If the comment is a trackback and part of the blogroll, then the trackback is
* automatically whitelisted. If the comment author was approved before, then
* the comment is automatically whitelisted.
*
* If none of the checks fail, then the failback is to set the check to pass
* (return true).
*
* @since 1.2.0
* @uses $wpdb
*
* @param string $author Comment Author's name
* @param string $email Comment Author's email
* @param string $url Comment Author's URL
* @param string $comment Comment contents
* @param string $user_ip Comment Author's IP address
* @param string $user_agent Comment Author's User Agent
* @param string $comment_type Comment type, either user submitted comment,
* trackback, or pingback
* @return bool Whether the checks passed (true) and the comments should be
* displayed or set to moderated
*/
function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $comment_type) {
global $wpdb;
if ( 1 == get_option('comment_moderation') )
return false; // If moderation is set to manual
if ( get_option('comment_max_links') && preg_match_all("/<[Aa][^>]*[Hh][Rr][Ee][Ff]=['\"]([^\"'>]+)[^>]*>/", apply_filters('comment_text',$comment), $out) >= get_option('comment_max_links') )
return false; // Check # of external links
$mod_keys = trim(get_option('moderation_keys'));
if ( !empty($mod_keys) ) {
$words = explode("\n", $mod_keys );
foreach ( (array) $words as $word) {
$word = trim($word);
// Skip empty lines
if ( empty($word) )
continue;
// Do some escaping magic so that '#' chars in the
// spam words don't break things:
$word = preg_quote($word, '#');
$pattern = "#$word#i";
if ( preg_match($pattern, $author) ) return false;
if ( preg_match($pattern, $email) ) return false;
if ( preg_match($pattern, $url) ) return false;
if ( preg_match($pattern, $comment) ) return false;
if ( preg_match($pattern, $user_ip) ) return false;
if ( preg_match($pattern, $user_agent) ) return false;
}
}
// Comment whitelisting:
if ( 1 == get_option('comment_whitelist')) {
if ( 'trackback' == $comment_type || 'pingback' == $comment_type ) { // check if domain is in blogroll
$uri = parse_url($url);
$domain = $uri['host'];
$uri = parse_url( get_option('home') );
$home_domain = $uri['host'];
if ( $wpdb->get_var($wpdb->prepare("SELECT link_id FROM $wpdb->links WHERE link_url LIKE (%s) LIMIT 1", '%'.$domain.'%')) || $domain == $home_domain )
return true;
else
return false;
} elseif ( $author != '' && $email != '' ) {
// expected_slashed ($author, $email)
$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");
if ( ( 1 == $ok_to_comment ) &&
( empty($mod_keys) || false === strpos( $email, $mod_keys) ) )
return true;
else
return false;
} else {
return false;
}
}
return true;
}
/**
* Retrieve the approved comments for post $post_id.
*
* @since 2.0.0
* @uses $wpdb
*
* @param int $post_id The ID of the post
* @return array $comments The approved comments
*/
function get_approved_comments($post_id) {
global $wpdb;
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));
}
/**
* Retrieves comment data given a comment ID or comment object.
*
* If an object is passed then the comment data will be cached and then returned
* after being passed through a filter. If the comment is empty, then the global
* comment variable will be used, if it is set.
*
* If the comment is empty, then the global comment variable will be used, if it
* is set.
*
* @since 2.0.0
* @uses $wpdb
*
* @param object|string|int $comment Comment to retrieve.
* @param string $output Optional. OBJECT or ARRAY_A or ARRAY_N constants.
* @return object|array|null Depends on $output value.
*/
function &get_comment(&$comment, $output = OBJECT) {
global $wpdb;
$null = null;
if ( empty($comment) ) {
if ( isset($GLOBALS['comment']) )
$_comment = & $GLOBALS['comment'];
else
$_comment = null;
} elseif ( is_object($comment) ) {
wp_cache_add($comment->comment_ID, $comment, 'comment');
$_comment = $comment;
} else {
if ( isset($GLOBALS['comment']) && ($GLOBALS['comment']->comment_ID == $comment) ) {
$_comment = & $GLOBALS['comment'];
} elseif ( ! $_comment = wp_cache_get($comment, 'comment') ) {
$_comment = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment));
if ( ! $_comment )
return $null;
wp_cache_add($_comment->comment_ID, $_comment, 'comment');
}
}
$_comment = apply_filters('get_comment', $_comment);
if ( $output == OBJECT ) {
return $_comment;
} elseif ( $output == ARRAY_A ) {
$__comment = get_object_vars($_comment);
return $__comment;
} elseif ( $output == ARRAY_N ) {
$__comment = array_values(get_object_vars($_comment));
return $__comment;
} else {
return $_comment;
}
}
/**
* Retrieve a list of comments.
*
* The comment list can be for the blog as a whole or for an individual post.
*
* The list of comment arguments are 'status', 'orderby', 'comment_date_gmt',
* 'order', 'number', 'offset', and 'post_id'.
*
* @since 2.7.0
* @uses $wpdb
*
* @param mixed $args Optional. Array or string of options to override defaults.
* @return array List of comments.
*/
function get_comments( $args = '' ) {
global $wpdb;
$defaults = array('status' => '', 'orderby' => 'comment_date_gmt', 'order' => 'DESC', 'number' => '', 'offset' => '', 'post_id' => 0);
$args = wp_parse_args( $args, $defaults );
extract( $args, EXTR_SKIP );
// $args can be whatever, only use the args defined in defaults to compute the key
$key = md5( serialize( compact(array_keys($defaults)) ) );
$last_changed = wp_cache_get('last_changed', 'comment');
if ( !$last_changed ) {
$last_changed = time();
wp_cache_set('last_changed', $last_changed, 'comment');
}
$cache_key = "get_comments:$key:$last_changed";
if ( $cache = wp_cache_get( $cache_key, 'comment' ) ) {
return $cache;
}
$post_id = absint($post_id);
if ( 'hold' == $status )
$approved = "comment_approved = '0'";
elseif ( 'approve' == $status )
$approved = "comment_approved = '1'";
elseif ( 'spam' == $status )
$approved = "comment_approved = 'spam'";
elseif ( 'trash' == $status )
$approved = "comment_approved = 'trash'";
else
$approved = "( comment_approved = '0' OR comment_approved = '1' )";
$order = ( 'ASC' == $order ) ? 'ASC' : 'DESC';
$orderby = 'comment_date_gmt'; // Hard code for now
$number = absint($number);
$offset = absint($offset);
if ( !empty($number) ) {
if ( $offset )
$number = 'LIMIT ' . $offset . ',' . $number;
else
$number = 'LIMIT ' . $number;
} else {
$number = '';
}
if ( ! empty($post_id) )
$post_where = $wpdb->prepare( 'comment_post_ID = %d AND', $post_id );
else
$post_where = '';
$comments = $wpdb->get_results( "SELECT * FROM $wpdb->comments WHERE $post_where $approved ORDER BY $orderby $order $number" );
wp_cache_add( $cache_key, $comments, 'comment' );
return $comments;
}
/**
* Retrieve all of the WordPress supported comment statuses.
*
* Comments have a limited set of valid status values, this provides the comment
* status values and descriptions.
*
* @package WordPress
* @subpackage Post
* @since 2.7.0
*
* @return array List of comment statuses.
*/
function get_comment_statuses( ) {
$status = array(
'hold' => __('Unapproved'),
/* translators: comment status */
'approve' => _x('Approved', 'adjective'),
/* translators: comment status */
'spam' => _x('Spam', 'adjective'),
);
return $status;
}
/**
* The date the last comment was modified.
*
* @since 1.5.0
* @uses $wpdb
* @global array $cache_lastcommentmodified
*
* @param string $timezone Which timezone to use in reference to 'gmt', 'blog',
* or 'server' locations.
* @return string Last comment modified date.
*/
function get_lastcommentmodified($timezone = 'server') {
global $cache_lastcommentmodified, $wpdb;
if ( isset($cache_lastcommentmodified[$timezone]) )
return $cache_lastcommentmodified[$timezone];
$add_seconds_server = date('Z');
switch ( strtolower($timezone)) {
case 'gmt':
$lastcommentmodified = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1");
break;
case 'blog':
$lastcommentmodified = $wpdb->get_var("SELECT comment_date FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1");
break;
case 'server':
$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));
break;
}
$cache_lastcommentmodified[$timezone] = $lastcommentmodified;
return $lastcommentmodified;
}
/**
* The amount of comments in a post or total comments.
*
* A lot like {@link wp_count_comments()}, in that they both return comment
* stats (albeit with different types). The {@link wp_count_comments()} actual
* caches, but this function does not.
*
* @since 2.0.0
* @uses $wpdb
*
* @param int $post_id Optional. Comment amount in post if > 0, else total comments blog wide.
* @return array The amount of spam, approved, awaiting moderation, and total comments.
*/
function get_comment_count( $post_id = 0 ) {
global $wpdb;
$post_id = (int) $post_id;
$where = '';
if ( $post_id > 0 ) {
$where = $wpdb->prepare("WHERE comment_post_ID = %d", $post_id);
}
$totals = (array) $wpdb->get_results("
SELECT comment_approved, COUNT( * ) AS total
FROM {$wpdb->comments}
{$where}
GROUP BY comment_approved
", ARRAY_A);
$comment_count = array(
"approved" => 0,
"awaiting_moderation" => 0,
"spam" => 0,
"total_comments" => 0
);
foreach ( $totals as $row ) {
switch ( $row['comment_approved'] ) {
case 'spam':
$comment_count['spam'] = $row['total'];
$comment_count["total_comments"] += $row['total'];
break;
case 1:
$comment_count['approved'] = $row['total'];
$comment_count['total_comments'] += $row['total'];
break;
case 0:
$comment_count['awaiting_moderation'] = $row['total'];
$comment_count['total_comments'] += $row['total'];
break;
default:
break;
}
}
return $comment_count;
}
//
// Comment meta functions
//
/**
* Add meta data field to a comment.
*
* Post meta data is called "Custom Fields" on the Administration Panels.
*
* @since 2.9
* @uses add_metadata
* @link http://codex.wordpress.org/Function_Reference/add_comment_meta
*
* @param int $comment_id Post ID.
* @param string $key Metadata name.
* @param mixed $value Metadata value.
* @param bool $unique Optional, default is false. Whether the same key should not be added.
* @return bool False for failure. True for success.
*/
function add_comment_meta($comment_id, $meta_key, $meta_value, $unique = false) {
return add_metadata('comment', $comment_id, $meta_key, $meta_value, $unique);
}
/**
* Remove metadata matching criteria from a comment.
*
* You can match based on the key, or key and value. Removing based on key and
* value, will keep from removing duplicate metadata with the same key. It also
* allows removing all metadata matching key, if needed.
*
* @since 2.9
* @uses delete_metadata
* @link http://codex.wordpress.org/Function_Reference/delete_comment_meta
*
* @param int $comment_id comment ID
* @param string $meta_key Metadata name.
* @param mixed $meta_value Optional. Metadata value.
* @return bool False for failure. True for success.
*/
function delete_comment_meta($comment_id, $meta_key, $meta_value = '') {
return delete_metadata('comment', $comment_id, $meta_key, $meta_value);
}
/**
* Retrieve comment meta field for a comment.
*
* @since 2.9
* @uses get_metadata
* @link http://codex.wordpress.org/Function_Reference/get_comment_meta
*
* @param int $comment_id Post ID.
* @param string $key The meta key to retrieve.
* @param bool $single Whether to return a single value.
* @return mixed Will be an array if $single is false. Will be value of meta data field if $single
* is true.
*/
function get_comment_meta($comment_id, $key, $single = false) {
return get_metadata('comment', $comment_id, $key, $single);
}
/**
* Update comment meta field based on comment ID.
*
* Use the $prev_value parameter to differentiate between meta fields with the
* same key and comment ID.
*
* If the meta field for the comment does not exist, it will be added.
*
* @since 2.9
* @uses update_metadata
* @link http://codex.wordpress.org/Function_Reference/update_comment_meta
*
* @param int $comment_id Post ID.
* @param string $key Metadata key.
* @param mixed $value Metadata value.
* @param mixed $prev_value Optional. Previous value to check before removing.
* @return bool False on failure, true if success.
*/
function update_comment_meta($comment_id, $meta_key, $meta_value, $prev_value = '') {
return update_metadata('comment', $comment_id, $meta_key, $meta_value, $prev_value);
}
/**
* Sanitizes the cookies sent to the user already.
*
* Will only do anything if the cookies have already been created for the user.
* Mostly used after cookies had been sent to use elsewhere.
*
* @since 2.0.4
*/
function sanitize_comment_cookies() {
if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) ) {
$comment_author = apply_filters('pre_comment_author_name', $_COOKIE['comment_author_'.COOKIEHASH]);
$comment_author = stripslashes($comment_author);
$comment_author = esc_attr($comment_author);
$_COOKIE['comment_author_'.COOKIEHASH] = $comment_author;
}
if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) ) {
$comment_author_email = apply_filters('pre_comment_author_email', $_COOKIE['comment_author_email_'.COOKIEHASH]);
$comment_author_email = stripslashes($comment_author_email);
$comment_author_email = esc_attr($comment_author_email);
$_COOKIE['comment_author_email_'.COOKIEHASH] = $comment_author_email;
}
if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) ) {
$comment_author_url = apply_filters('pre_comment_author_url', $_COOKIE['comment_author_url_'.COOKIEHASH]);
$comment_author_url = stripslashes($comment_author_url);
$_COOKIE['comment_author_url_'.COOKIEHASH] = $comment_author_url;
}
}
/**
* Validates whether this comment is allowed to be made or not.
*
* @since 2.0.0
* @uses $wpdb
* @uses apply_filters() Calls 'pre_comment_approved' hook on the type of comment
* @uses do_action() Calls 'check_comment_flood' hook on $comment_author_IP, $comment_author_email, and $comment_date_gmt
*
* @param array $commentdata Contains information on the comment
* @return mixed Signifies the approval status (0|1|'spam')
*/
function wp_allow_comment($commentdata) {
global $wpdb;
extract($commentdata, EXTR_SKIP);
// Simple duplicate check
// expected_slashed ($comment_post_ID, $comment_author, $comment_author_email, $comment_content)
$dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND comment_approved != 'trash' AND ( comment_author = '$comment_author' ";
if ( $comment_author_email )
$dupe .= "OR comment_author_email = '$comment_author_email' ";
$dupe .= ") AND comment_content = '$comment_content' LIMIT 1";
if ( $wpdb->get_var($dupe) ) {
if ( defined('DOING_AJAX') )
die( __('Duplicate comment detected; it looks as though you&#8217;ve already said that!') );
wp_die( __('Duplicate comment detected; it looks as though you&#8217;ve already said that!') );
}
do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt );
if ( $user_id ) {
$userdata = get_userdata($user_id);
$user = new WP_User($user_id);
$post_author = $wpdb->get_var($wpdb->prepare("SELECT post_author FROM $wpdb->posts WHERE ID = %d LIMIT 1", $comment_post_ID));
}
if ( isset($userdata) && ( $user_id == $post_author || $user->has_cap('moderate_comments') ) ) {
// The author and the admins get respect.
$approved = 1;
} else {
// Everyone else's comments will be checked.
if ( check_comment($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent, $comment_type) )
$approved = 1;
else
$approved = 0;
if ( wp_blacklist_check($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent) )
$approved = 'spam';
}
$approved = apply_filters('pre_comment_approved', $approved);
return $approved;
}
/**
* Check whether comment flooding is occurring.
*
* Won't run, if current user can manage options, so to not block
* administrators.
*
* @since 2.3.0
* @uses $wpdb
* @uses apply_filters() Calls 'comment_flood_filter' filter with first
* parameter false, last comment timestamp, new comment timestamp.
* @uses do_action() Calls 'comment_flood_trigger' action with parameters with
* last comment timestamp and new comment timestamp.
*
* @param string $ip Comment IP.
* @param string $email Comment author email address.
* @param string $date MySQL time string.
*/
function check_comment_flood_db( $ip, $email, $date ) {
global $wpdb;
if ( current_user_can( 'manage_options' ) )
return; // don't throttle admins
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) ) ) {
$time_lastcomment = mysql2date('U', $lasttime, false);
$time_newcomment = mysql2date('U', $date, false);
$flood_die = apply_filters('comment_flood_filter', false, $time_lastcomment, $time_newcomment);
if ( $flood_die ) {
do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
if ( defined('DOING_AJAX') )
die( __('You are posting comments too quickly. Slow down.') );
wp_die( __('You are posting comments too quickly. Slow down.'), '', array('response' => 403) );
}
}
}
/**
* Separates an array of comments into an array keyed by comment_type.
*
* @since 2.7.0
*
* @param array $comments Array of comments
* @return array Array of comments keyed by comment_type.
*/
function &separate_comments(&$comments) {
$comments_by_type = array('comment' => array(), 'trackback' => array(), 'pingback' => array(), 'pings' => array());
$count = count($comments);
for ( $i = 0; $i < $count; $i++ ) {
$type = $comments[$i]->comment_type;
if ( empty($type) )
$type = 'comment';
$comments_by_type[$type][] = &$comments[$i];
if ( 'trackback' == $type || 'pingback' == $type )
$comments_by_type['pings'][] = &$comments[$i];
}
return $comments_by_type;
}
/**
* Calculate the total number of comment pages.
*
* @since 2.7.0
* @uses get_query_var() Used to fill in the default for $per_page parameter.
* @uses get_option() Used to fill in defaults for parameters.
* @uses Walker_Comment
*
* @param array $comments Optional array of comment objects. Defaults to $wp_query->comments
* @param int $per_page Optional comments per page.
* @param boolean $threaded Optional control over flat or threaded comments.
* @return int Number of comment pages.
*/
function get_comment_pages_count( $comments = null, $per_page = null, $threaded = null ) {
global $wp_query;
if ( null === $comments && null === $per_page && null === $threaded && !empty($wp_query->max_num_comment_pages) )
return $wp_query->max_num_comment_pages;
if ( !$comments || !is_array($comments) )
$comments = $wp_query->comments;
if ( empty($comments) )
return 0;
if ( !isset($per_page) )
$per_page = (int) get_query_var('comments_per_page');
if ( 0 === $per_page )
$per_page = (int) get_option('comments_per_page');
if ( 0 === $per_page )
return 1;
if ( !isset($threaded) )
$threaded = get_option('thread_comments');
if ( $threaded ) {
$walker = new Walker_Comment;
$count = ceil( $walker->get_number_of_root_elements( $comments ) / $per_page );
} else {
$count = ceil( count( $comments ) / $per_page );
}
return $count;
}
/**
* Calculate what page number a comment will appear on for comment paging.
*
* @since 2.7.0
* @uses get_comment() Gets the full comment of the $comment_ID parameter.
* @uses get_option() Get various settings to control function and defaults.
* @uses get_page_of_comment() Used to loop up to top level comment.
*
* @param int $comment_ID Comment ID.
* @param array $args Optional args.
* @return int|null Comment page number or null on error.
*/
function get_page_of_comment( $comment_ID, $args = array() ) {
global $wpdb;
if ( !$comment = get_comment( $comment_ID ) )
return;
$defaults = array( 'type' => 'all', 'page' => '', 'per_page' => '', 'max_depth' => '' );
$args = wp_parse_args( $args, $defaults );
if ( '' === $args['per_page'] && get_option('page_comments') )
$args['per_page'] = get_query_var('comments_per_page');
if ( empty($args['per_page']) ) {
$args['per_page'] = 0;
$args['page'] = 0;
}
if ( $args['per_page'] < 1 )
return 1;
if ( '' === $args['max_depth'] ) {
if ( get_option('thread_comments') )
$args['max_depth'] = get_option('thread_comments_depth');
else
$args['max_depth'] = -1;
}
// Find this comment's top level parent if threading is enabled
if ( $args['max_depth'] > 1 && 0 != $comment->comment_parent )
return get_page_of_comment( $comment->comment_parent, $args );
$allowedtypes = array(
'comment' => '',
'pingback' => 'pingback',
'trackback' => 'trackback',
);
$comtypewhere = ( 'all' != $args['type'] && isset($allowedtypes[$args['type']]) ) ? " AND comment_type = '" . $allowedtypes[$args['type']] . "'" : '';
// Count comments older than this one
$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 ) );
// No older comments? Then it's page #1.
if ( 0 == $oldercoms )
return 1;
// Divide comments older than this one by comments per page to get this comment's page number
return ceil( ( $oldercoms + 1 ) / $args['per_page'] );
}
/**
* Does comment contain blacklisted characters or words.
*
* @since 1.5.0
* @uses do_action() Calls 'wp_blacklist_check' hook for all parameters.
*
* @param string $author The author of the comment
* @param string $email The email of the comment
* @param string $url The url used in the comment
* @param string $comment The comment content
* @param string $user_ip The comment author IP address
* @param string $user_agent The author's browser user agent
* @return bool True if comment contains blacklisted content, false if comment does not
*/
function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) {
do_action('wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent);
$mod_keys = trim( get_option('blacklist_keys') );
if ( '' == $mod_keys )
return false; // If moderation keys are empty
$words = explode("\n", $mod_keys );
foreach ( (array) $words as $word ) {
$word = trim($word);
// Skip empty lines
if ( empty($word) ) { continue; }
// Do some escaping magic so that '#' chars in the
// spam words don't break things:
$word = preg_quote($word, '#');
$pattern = "#$word#i";
if (
preg_match($pattern, $author)
|| preg_match($pattern, $email)
|| preg_match($pattern, $url)
|| preg_match($pattern, $comment)
|| preg_match($pattern, $user_ip)
|| preg_match($pattern, $user_agent)
)
return true;
}
return false;
}
/**
* Retrieve total comments for blog or single post.
*
* The properties of the returned object contain the 'moderated', 'approved',
* and spam comments for either the entire blog or single post. Those properties
* contain the amount of comments that match the status. The 'total_comments'
* property contains the integer of total comments.
*
* The comment stats are cached and then retrieved, if they already exist in the
* cache.
*
* @since 2.5.0
*
* @param int $post_id Optional. Post ID.
* @return object Comment stats.
*/
function wp_count_comments( $post_id = 0 ) {
global $wpdb;
$post_id = (int) $post_id;
$stats = apply_filters('wp_count_comments', array(), $post_id);
if ( !empty($stats) )
return $stats;
$count = wp_cache_get("comments-{$post_id}", 'counts');
if ( false !== $count )
return $count;
$where = '';
if ( $post_id > 0 )
$where = $wpdb->prepare( "WHERE comment_post_ID = %d", $post_id );
$count = $wpdb->get_results( "SELECT comment_approved, COUNT( * ) AS num_comments FROM {$wpdb->comments} {$where} GROUP BY comment_approved", ARRAY_A );
$total = 0;
$approved = array('0' => 'moderated', '1' => 'approved', 'spam' => 'spam', 'trash' => 'trash', 'post-trashed' => 'post-trashed');
$known_types = array_keys( $approved );
foreach( (array) $count as $row_num => $row ) {
// Don't count post-trashed toward totals
if ( 'post-trashed' != $row['comment_approved'] && 'trash' != $row['comment_approved'] )
$total += $row['num_comments'];
if ( in_array( $row['comment_approved'], $known_types ) )
$stats[$approved[$row['comment_approved']]] = $row['num_comments'];
}
$stats['total_comments'] = $total;
foreach ( $approved as $key ) {
if ( empty($stats[$key]) )
$stats[$key] = 0;
}
$stats = (object) $stats;
wp_cache_set("comments-{$post_id}", $stats, 'counts');
return $stats;
}
/**
* Removes comment ID and maybe updates post comment count.
*
* The post comment count will be updated if the comment was approved and has a
* post ID available.
*
* @since 2.0.0
* @uses $wpdb
* @uses do_action() Calls 'delete_comment' hook on comment ID
* @uses do_action() Calls 'wp_set_comment_status' hook on comment ID with 'delete' set for the second parameter
* @uses wp_transition_comment_status() Passes new and old comment status along with $comment object
*
* @param int $comment_id Comment ID
* @return bool False if delete comment query failure, true on success.
*/
function wp_delete_comment($comment_id) {
global $wpdb;
if (!$comment = get_comment($comment_id))
return false;
if (wp_get_comment_status($comment_id) != 'trash' && wp_get_comment_status($comment_id) != 'spam' && EMPTY_TRASH_DAYS > 0)
return wp_trash_comment($comment_id);
do_action('delete_comment', $comment_id);
delete_comment_meta($comment_id,'_wp_trash_meta_status');
delete_comment_meta($comment_id,'_wp_trash_meta_time');
if ( ! $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment_id) ) )
return false;
// Move children up a level.
$children = $wpdb->get_col( $wpdb->prepare("SELECT comment_ID FROM $wpdb->comments WHERE comment_parent = %d", $comment_id) );
if ( !empty($children) ) {
$wpdb->update($wpdb->comments, array('comment_parent' => $comment->comment_parent), array('comment_parent' => $comment_id));
clean_comment_cache($children);
}
$post_id = $comment->comment_post_ID;
if ( $post_id && $comment->comment_approved == 1 )
wp_update_comment_count($post_id);
clean_comment_cache($comment_id);
do_action('wp_set_comment_status', $comment_id, 'delete');
wp_transition_comment_status('delete', $comment->comment_approved, $comment);
return true;
}
/**
* Moves a comment to the Trash
*
* @since 2.9.0
* @uses do_action() on 'trash_comment' before trashing
* @uses do_action() on 'trashed_comment' after trashing
*
* @param int $comment_id Comment ID.
* @return mixed False on failure
*/
function wp_trash_comment($comment_id) {
if ( EMPTY_TRASH_DAYS == 0 )
return wp_delete_comment($comment_id);
if ( !$comment = get_comment($comment_id) )
return false;
do_action('trash_comment', $comment_id);
if ( wp_set_comment_status($comment_id, 'trash') ) {
add_comment_meta($comment_id, '_wp_trash_meta_status', $comment->comment_approved);
add_comment_meta($comment_id, '_wp_trash_meta_time', time() );
do_action('trashed_comment', $comment_id);
return true;
}
return false;
}
/**
* Removes a comment from the Trash
*
* @since 2.9.0
* @uses do_action() on 'untrash_comment' before untrashing
* @uses do_action() on 'untrashed_comment' after untrashing
*
* @param int $comment_id Comment ID.
* @return mixed False on failure
*/
function wp_untrash_comment($comment_id) {
if ( ! (int)$comment_id )
return false;
do_action('untrash_comment', $comment_id);
$status = (string) get_comment_meta($comment_id, '_wp_trash_meta_status', true);
if ( empty($status) )
$status = '0';
if ( wp_set_comment_status($comment_id, $status) ) {
delete_comment_meta($comment_id, '_wp_trash_meta_time');
delete_comment_meta($comment_id, '_wp_trash_meta_status');
do_action('untrashed_comment', $comment_id);
return true;
}
return false;
}
/**
* Marks a comment as Spam
*
* @since 2.9.0
* @uses do_action() on 'spam_comment' before spamming
* @uses do_action() on 'spammed_comment' after spamming
*
* @param int $comment_id Comment ID.
* @return mixed False on failure
*/
function wp_spam_comment($comment_id) {
if ( !$comment = get_comment($comment_id) )
return false;
do_action('spam_comment', $comment_id);
if ( wp_set_comment_status($comment_id, 'spam') ) {
add_comment_meta($comment_id, '_wp_trash_meta_status', $comment->comment_approved);
do_action('spammed_comment', $comment_id);
return true;
}
return false;
}
/**
* Removes a comment from the Spam
*
* @since 2.9.0
* @uses do_action() on 'unspam_comment' before unspamming
* @uses do_action() on 'unspammed_comment' after unspamming
*
* @param int $comment_id Comment ID.
* @return mixed False on failure
*/
function wp_unspam_comment($comment_id) {
if ( ! (int)$comment_id )
return false;
do_action('unspam_comment', $comment_id);
$status = (string) get_comment_meta($comment_id, '_wp_trash_meta_status', true);
if ( empty($status) )
$status = '0';
if ( wp_set_comment_status($comment_id, $status) ) {
delete_comment_meta($comment_id, '_wp_trash_meta_status');
do_action('unspammed_comment', $comment_id);
return true;
}
return false;
}
/**
* The status of a comment by ID.
*
* @since 1.0.0
*
* @param int $comment_id Comment ID
* @return string|bool Status might be 'trash', 'approved', 'unapproved', 'spam'. False on failure.
*/
function wp_get_comment_status($comment_id) {
$comment = get_comment($comment_id);
if ( !$comment )
return false;
$approved = $comment->comment_approved;
if ( $approved == NULL )
return false;
elseif ( $approved == '1' )
return 'approved';
elseif ( $approved == '0' )
return 'unapproved';
elseif ( $approved == 'spam' )
return 'spam';
elseif ( $approved == 'trash' )
return 'trash';
else
return false;
}
/**
* Call hooks for when a comment status transition occurs.
*
* Calls hooks for comment status transitions. If the new comment status is not the same
* as the previous comment status, then two hooks will be ran, the first is
* 'transition_comment_status' with new status, old status, and comment data. The
* next action called is 'comment_OLDSTATUS_to_NEWSTATUS' the NEWSTATUS is the
* $new_status parameter and the OLDSTATUS is $old_status parameter; it has the
* comment data.
*
* The final action will run whether or not the comment statuses are the same. The
* action is named 'comment_NEWSTATUS_COMMENTTYPE', NEWSTATUS is from the $new_status
* parameter and COMMENTTYPE is comment_type comment data.
*
* @since 2.7.0
*
* @param string $new_status New comment status.
* @param string $old_status Previous comment status.
* @param object $comment Comment data.
*/
function wp_transition_comment_status($new_status, $old_status, $comment) {
// Translate raw statuses to human readable formats for the hooks
// This is not a complete list of comment status, it's only the ones that need to be renamed
$comment_statuses = array(
0 => 'unapproved',
'hold' => 'unapproved', // wp_set_comment_status() uses "hold"
1 => 'approved',
'approve' => 'approved', // wp_set_comment_status() uses "approve"
);
if ( isset($comment_statuses[$new_status]) ) $new_status = $comment_statuses[$new_status];
if ( isset($comment_statuses[$old_status]) ) $old_status = $comment_statuses[$old_status];
// Call the hooks
if ( $new_status != $old_status ) {
do_action('transition_comment_status', $new_status, $old_status, $comment);
do_action("comment_${old_status}_to_$new_status", $comment);
}
do_action("comment_${new_status}_$comment->comment_type", $comment->comment_ID, $comment);
}
/**
* Get current commenter's name, email, and URL.
*
* Expects cookies content to already be sanitized. User of this function might
* wish to recheck the returned array for validity.
*
* @see sanitize_comment_cookies() Use to sanitize cookies
*
* @since 2.0.4
*
* @return array Comment author, email, url respectively.
*/
function wp_get_current_commenter() {
// Cookies should already be sanitized.
$comment_author = '';
if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) )
$comment_author = $_COOKIE['comment_author_'.COOKIEHASH];
$comment_author_email = '';
if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) )
$comment_author_email = $_COOKIE['comment_author_email_'.COOKIEHASH];
$comment_author_url = '';
if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) )
$comment_author_url = $_COOKIE['comment_author_url_'.COOKIEHASH];
return compact('comment_author', 'comment_author_email', 'comment_author_url');
}
/**
* Inserts a comment to the database.
*
* The available comment data key names are 'comment_author_IP', 'comment_date',
* 'comment_date_gmt', 'comment_parent', 'comment_approved', and 'user_id'.
*
* @since 2.0.0
* @uses $wpdb
*
* @param array $commentdata Contains information on the comment.
* @return int The new comment's ID.
*/
function wp_insert_comment($commentdata) {
global $wpdb;
extract(stripslashes_deep($commentdata), EXTR_SKIP);
if ( ! isset($comment_author_IP) )
$comment_author_IP = '';
if ( ! isset($comment_date) )
$comment_date = current_time('mysql');
if ( ! isset($comment_date_gmt) )
$comment_date_gmt = get_gmt_from_date($comment_date);
if ( ! isset($comment_parent) )
$comment_parent = 0;
if ( ! isset($comment_approved) )
$comment_approved = 1;
if ( ! isset($comment_karma) )
$comment_karma = 0;
if ( ! isset($user_id) )
$user_id = 0;
if ( ! isset($comment_type) )
$comment_type = '';
$data = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_date', 'comment_date_gmt', 'comment_content', 'comment_karma', 'comment_approved', 'comment_agent', 'comment_type', 'comment_parent', 'user_id');
$wpdb->insert($wpdb->comments, $data);
$id = (int) $wpdb->insert_id;
if ( $comment_approved == 1 )
wp_update_comment_count($comment_post_ID);
$comment = get_comment($id);
do_action('wp_insert_comment', $id, $comment);
return $id;
}
/**
* Filters and sanitizes comment data.
*
* Sets the comment data 'filtered' field to true when finished. This can be
* checked as to whether the comment should be filtered and to keep from
* filtering the same comment more than once.
*
* @since 2.0.0
* @uses apply_filters() Calls 'pre_user_id' hook on comment author's user ID
* @uses apply_filters() Calls 'pre_comment_user_agent' hook on comment author's user agent
* @uses apply_filters() Calls 'pre_comment_author_name' hook on comment author's name
* @uses apply_filters() Calls 'pre_comment_content' hook on the comment's content
* @uses apply_filters() Calls 'pre_comment_user_ip' hook on comment author's IP
* @uses apply_filters() Calls 'pre_comment_author_url' hook on comment author's URL
* @uses apply_filters() Calls 'pre_comment_author_email' hook on comment author's email address
*
* @param array $commentdata Contains information on the comment.
* @return array Parsed comment information.
*/
function wp_filter_comment($commentdata) {
if ( isset($commentdata['user_ID']) )
$commentdata['user_id'] = apply_filters('pre_user_id', $commentdata['user_ID']);
elseif ( isset($commentdata['user_id']) )
$commentdata['user_id'] = apply_filters('pre_user_id', $commentdata['user_id']);
$commentdata['comment_agent'] = apply_filters('pre_comment_user_agent', $commentdata['comment_agent']);
$commentdata['comment_author'] = apply_filters('pre_comment_author_name', $commentdata['comment_author']);
$commentdata['comment_content'] = apply_filters('pre_comment_content', $commentdata['comment_content']);
$commentdata['comment_author_IP'] = apply_filters('pre_comment_user_ip', $commentdata['comment_author_IP']);
$commentdata['comment_author_url'] = apply_filters('pre_comment_author_url', $commentdata['comment_author_url']);
$commentdata['comment_author_email'] = apply_filters('pre_comment_author_email', $commentdata['comment_author_email']);
$commentdata['filtered'] = true;
return $commentdata;
}
/**
* Whether comment should be blocked because of comment flood.
*
* @since 2.1.0
*
* @param bool $block Whether plugin has already blocked comment.
* @param int $time_lastcomment Timestamp for last comment.
* @param int $time_newcomment Timestamp for new comment.
* @return bool Whether comment should be blocked.
*/
function wp_throttle_comment_flood($block, $time_lastcomment, $time_newcomment) {
if ( $block ) // a plugin has already blocked... we'll let that decision stand
return $block;
if ( ($time_newcomment - $time_lastcomment) < 15 )
return true;
return false;
}
/**
* Adds a new comment to the database.
*
* Filters new comment to ensure that the fields are sanitized and valid before
* inserting comment into database. Calls 'comment_post' action with comment ID
* and whether comment is approved by WordPress. Also has 'preprocess_comment'
* filter for processing the comment data before the function handles it.
*
* @since 1.5.0
* @uses apply_filters() Calls 'preprocess_comment' hook on $commentdata parameter array before processing
* @uses do_action() Calls 'comment_post' hook on $comment_ID returned from adding the comment and if the comment was approved.
* @uses wp_filter_comment() Used to filter comment before adding comment.
* @uses wp_allow_comment() checks to see if comment is approved.
* @uses wp_insert_comment() Does the actual comment insertion to the database.
*
* @param array $commentdata Contains information on the comment.
* @return int The ID of the comment after adding.
*/
function wp_new_comment( $commentdata ) {
$commentdata = apply_filters('preprocess_comment', $commentdata);
$commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID'];
if ( isset($commentdata['user_ID']) )
$commentdata['user_id'] = $commentdata['user_ID'] = (int) $commentdata['user_ID'];
elseif ( isset($commentdata['user_id']) )
$commentdata['user_id'] = (int) $commentdata['user_id'];
$commentdata['comment_parent'] = isset($commentdata['comment_parent']) ? absint($commentdata['comment_parent']) : 0;
$parent_status = ( 0 < $commentdata['comment_parent'] ) ? wp_get_comment_status($commentdata['comment_parent']) : '';
$commentdata['comment_parent'] = ( 'approved' == $parent_status || 'unapproved' == $parent_status ) ? $commentdata['comment_parent'] : 0;
$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '',$_SERVER['REMOTE_ADDR'] );
$commentdata['comment_agent'] = substr($_SERVER['HTTP_USER_AGENT'], 0, 254);
$commentdata['comment_date'] = current_time('mysql');
$commentdata['comment_date_gmt'] = current_time('mysql', 1);
$commentdata = wp_filter_comment($commentdata);
$commentdata['comment_approved'] = wp_allow_comment($commentdata);
$comment_ID = wp_insert_comment($commentdata);
do_action('comment_post', $comment_ID, $commentdata['comment_approved']);
if ( 'spam' !== $commentdata['comment_approved'] ) { // If it's spam save it silently for later crunching
if ( '0' == $commentdata['comment_approved'] )
wp_notify_moderator($comment_ID);
$post = &get_post($commentdata['comment_post_ID']); // Don't notify if it's your own comment
if ( get_option('comments_notify') && $commentdata['comment_approved'] && $post->post_author != $commentdata['user_id'] )
wp_notify_postauthor($comment_ID, $commentdata['comment_type']);
}
return $comment_ID;
}
/**
* Sets the status of a comment.
*
* The 'wp_set_comment_status' action is called after the comment is handled and
* will only be called, if the comment status is either 'hold', 'approve', or
* 'spam'. If the comment status is not in the list, then false is returned and
* if the status is 'delete', then the comment is deleted without calling the
* action.
*
* @since 1.0.0
* @uses wp_transition_comment_status() Passes new and old comment status along with $comment object
*
* @param int $comment_id Comment ID.
* @param string $comment_status New comment status, either 'hold', 'approve', 'spam', or 'delete'.
* @param bool $wp_error Whether to return a WP_Error object if there is a failure. Default is false.
* @return bool False on failure or deletion and true on success.
*/
function wp_set_comment_status($comment_id, $comment_status, $wp_error = false) {
global $wpdb;
$status = '0';
switch ( $comment_status ) {
case 'hold':
case '0':
$status = '0';
break;
case 'approve':
case '1':
$status = '1';
if ( get_option('comments_notify') ) {
$comment = get_comment($comment_id);
wp_notify_postauthor($comment_id, $comment->comment_type);
}
break;
case 'spam':
$status = 'spam';
break;
case 'trash':
$status = 'trash';
break;
default:
return false;
}
$comment_old = wp_clone(get_comment($comment_id));
if ( !$wpdb->update( $wpdb->comments, array('comment_approved' => $status), array('comment_ID' => $comment_id) ) ) {
if ( $wp_error )
return new WP_Error('db_update_error', __('Could not update comment status'), $wpdb->last_error);
else
return false;
}
clean_comment_cache($comment_id);
$comment = get_comment($comment_id);
do_action('wp_set_comment_status', $comment_id, $comment_status);
wp_transition_comment_status($comment_status, $comment_old->comment_approved, $comment);
wp_update_comment_count($comment->comment_post_ID);
return true;
}
/**
* Updates an existing comment in the database.
*
* Filters the comment and makes sure certain fields are valid before updating.
*
* @since 2.0.0
* @uses $wpdb
* @uses wp_transition_comment_status() Passes new and old comment status along with $comment object
*
* @param array $commentarr Contains information on the comment.
* @return int Comment was updated if value is 1, or was not updated if value is 0.
*/
function wp_update_comment($commentarr) {
global $wpdb;
// First, get all of the original fields
$comment = get_comment($commentarr['comment_ID'], ARRAY_A);
// Escape data pulled from DB.
$comment = esc_sql($comment);
$old_status = $comment['comment_approved'];
// Merge old and new fields with new fields overwriting old ones.
$commentarr = array_merge($comment, $commentarr);
$commentarr = wp_filter_comment( $commentarr );
// Now extract the merged array.
extract(stripslashes_deep($commentarr), EXTR_SKIP);
$comment_content = apply_filters('comment_save_pre', $comment_content);
$comment_date_gmt = get_gmt_from_date($comment_date);
if ( !isset($comment_approved) )
$comment_approved = 1;
else if ( 'hold' == $comment_approved )
$comment_approved = 0;
else if ( 'approve' == $comment_approved )
$comment_approved = 1;
$data = compact('comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt');
$wpdb->update($wpdb->comments, $data, compact('comment_ID'));
$rval = $wpdb->rows_affected;
clean_comment_cache($comment_ID);
wp_update_comment_count($comment_post_ID);
do_action('edit_comment', $comment_ID);
$comment = get_comment($comment_ID);
wp_transition_comment_status($comment->comment_approved, $old_status, $comment);
return $rval;
}
/**
* Whether to defer comment counting.
*
* When setting $defer to true, all post comment counts will not be updated
* until $defer is set to false. When $defer is set to false, then all
* previously deferred updated post comment counts will then be automatically
* updated without having to call wp_update_comment_count() after.
*
* @since 2.5.0
* @staticvar bool $_defer
*
* @param bool $defer
* @return unknown
*/
function wp_defer_comment_counting($defer=null) {
static $_defer = false;
if ( is_bool($defer) ) {
$_defer = $defer;
// flush any deferred counts
if ( !$defer )
wp_update_comment_count( null, true );
}
return $_defer;
}
/**
* Updates the comment count for post(s).
*
* When $do_deferred is false (is by default) and the comments have been set to
* be deferred, the post_id will be added to a queue, which will be updated at a
* later date and only updated once per post ID.
*
* If the comments have not be set up to be deferred, then the post will be
* updated. When $do_deferred is set to true, then all previous deferred post
* IDs will be updated along with the current $post_id.
*
* @since 2.1.0
* @see wp_update_comment_count_now() For what could cause a false return value
*
* @param int $post_id Post ID
* @param bool $do_deferred Whether to process previously deferred post comment counts
* @return bool True on success, false on failure
*/
function wp_update_comment_count($post_id, $do_deferred=false) {
static $_deferred = array();
if ( $do_deferred ) {
$_deferred = array_unique($_deferred);
foreach ( $_deferred as $i => $_post_id ) {
wp_update_comment_count_now($_post_id);
unset( $_deferred[$i] ); /** @todo Move this outside of the foreach and reset $_deferred to an array instead */
}
}
if ( wp_defer_comment_counting() ) {
$_deferred[] = $post_id;
return true;
}
elseif ( $post_id ) {
return wp_update_comment_count_now($post_id);
}
}
/**
* Updates the comment count for the post.
*
* @since 2.5.0
* @uses $wpdb
* @uses do_action() Calls 'wp_update_comment_count' hook on $post_id, $new, and $old
* @uses do_action() Calls 'edit_posts' hook on $post_id and $post
*
* @param int $post_id Post ID
* @return bool False on '0' $post_id or if post with ID does not exist. True on success.
*/
function wp_update_comment_count_now($post_id) {
global $wpdb;
$post_id = (int) $post_id;
if ( !$post_id )
return false;
if ( !$post = get_post($post_id) )
return false;
$old = (int) $post->comment_count;
$new = (int) $wpdb->get_var( $wpdb->prepare("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1'", $post_id) );
$wpdb->update( $wpdb->posts, array('comment_count' => $new), array('ID' => $post_id) );
if ( 'page' == $post->post_type )
clean_page_cache( $post_id );
else
clean_post_cache( $post_id );
do_action('wp_update_comment_count', $post_id, $new, $old);
do_action('edit_post', $post_id, $post);
return true;
}
//
// Ping and trackback functions.
//
/**
* Finds a pingback server URI based on the given URL.
*
* Checks the HTML for the rel="pingback" link and x-pingback headers. It does
* a check for the x-pingback headers first and returns that, if available. The
* check for the rel="pingback" has more overhead than just the header.
*
* @since 1.5.0
*
* @param string $url URL to ping.
* @param int $deprecated Not Used.
* @return bool|string False on failure, string containing URI on success.
*/
function discover_pingback_server_uri($url, $deprecated = 2048) {
$pingback_str_dquote = 'rel="pingback"';
$pingback_str_squote = 'rel=\'pingback\'';
/** @todo Should use Filter Extension or custom preg_match instead. */
$parsed_url = parse_url($url);
if ( ! isset( $parsed_url['host'] ) ) // Not an URL. This should never happen.
return false;
//Do not search for a pingback server on our own uploads
$uploads_dir = wp_upload_dir();
if ( 0 === strpos($url, $uploads_dir['baseurl']) )
return false;
$response = wp_remote_head( $url, array( 'timeout' => 2, 'httpversion' => '1.0' ) );
if ( is_wp_error( $response ) )
return false;
if ( isset( $response['headers']['x-pingback'] ) )
return $response['headers']['x-pingback'];
// Not an (x)html, sgml, or xml page, no use going further.
if ( isset( $response['headers']['content-type'] ) && preg_match('#(image|audio|video|model)/#is', $response['headers']['content-type']) )
return false;
// Now do a GET since we're going to look in the html headers (and we're sure its not a binary file)
$response = wp_remote_get( $url, array( 'timeout' => 2, 'httpversion' => '1.0' ) );
if ( is_wp_error( $response ) )
return false;
$contents = $response['body'];
$pingback_link_offset_dquote = strpos($contents, $pingback_str_dquote);
$pingback_link_offset_squote = strpos($contents, $pingback_str_squote);
if ( $pingback_link_offset_dquote || $pingback_link_offset_squote ) {
$quote = ($pingback_link_offset_dquote) ? '"' : '\'';
$pingback_link_offset = ($quote=='"') ? $pingback_link_offset_dquote : $pingback_link_offset_squote;
$pingback_href_pos = @strpos($contents, 'href=', $pingback_link_offset);
$pingback_href_start = $pingback_href_pos+6;
$pingback_href_end = @strpos($contents, $quote, $pingback_href_start);
$pingback_server_url_len = $pingback_href_end - $pingback_href_start;
$pingback_server_url = substr($contents, $pingback_href_start, $pingback_server_url_len);
// We may find rel="pingback" but an incomplete pingback URL
if ( $pingback_server_url_len > 0 ) { // We got it!
return $pingback_server_url;
}
}
return false;
}
/**
* Perform all pingbacks, enclosures, trackbacks, and send to pingback services.
*
* @since 2.1.0
* @uses $wpdb
*/
function do_all_pings() {
global $wpdb;
// Do pingbacks
while ($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")) {
$mid = $wpdb->get_var( "SELECT meta_id FROM {$wpdb->postmeta} WHERE post_id = {$ping->ID} AND meta_key = '_pingme' LIMIT 1");
do_action( 'delete_postmeta', $mid );
$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->postmeta} WHERE meta_id = %d", $mid ) );
do_action( 'deleted_postmeta', $mid );
pingback($ping->post_content, $ping->ID);
}
// Do Enclosures
while ($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")) {
$mid = $wpdb->get_var( $wpdb->prepare("SELECT meta_id FROM {$wpdb->postmeta} WHERE post_id = %d AND meta_key = '_encloseme'", $enclosure->ID) );
do_action( 'delete_postmeta', $mid );
$wpdb->query( $wpdb->prepare("DELETE FROM {$wpdb->postmeta} WHERE meta_id = %d", $mid) );
do_action( 'deleted_postmeta', $mid );
do_enclose($enclosure->post_content, $enclosure->ID);
}
// Do Trackbacks
$trackbacks = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE to_ping <> '' AND post_status = 'publish'");
if ( is_array($trackbacks) )
foreach ( $trackbacks as $trackback )
do_trackbacks($trackback);
//Do Update Services/Generic Pings
generic_ping();
}
/**
* Perform trackbacks.
*
* @since 1.5.0
* @uses $wpdb
*
* @param int $post_id Post ID to do trackbacks on.
*/
function do_trackbacks($post_id) {
global $wpdb;
$post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) );
$to_ping = get_to_ping($post_id);
$pinged = get_pung($post_id);
if ( empty($to_ping) ) {
$wpdb->update($wpdb->posts, array('to_ping' => ''), array('ID' => $post_id) );
return;
}
if ( empty($post->post_excerpt) )
$excerpt = apply_filters('the_content', $post->post_content);
else
$excerpt = apply_filters('the_excerpt', $post->post_excerpt);
$excerpt = str_replace(']]>', ']]&gt;', $excerpt);
$excerpt = wp_html_excerpt($excerpt, 252) . '...';
$post_title = apply_filters('the_title', $post->post_title);
$post_title = strip_tags($post_title);
if ( $to_ping ) {
foreach ( (array) $to_ping as $tb_ping ) {
$tb_ping = trim($tb_ping);
if ( !in_array($tb_ping, $pinged) ) {
trackback($tb_ping, $post_title, $excerpt, $post_id);
$pinged[] = $tb_ping;
} else {
$wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, '$tb_ping', '')) WHERE ID = %d", $post_id) );
}
}
}
}
/**
* Sends pings to all of the ping site services.
*
* @since 1.2.0
*
* @param int $post_id Post ID. Not actually used.
* @return int Same as Post ID from parameter
*/
function generic_ping($post_id = 0) {
$services = get_option('ping_sites');
$services = explode("\n", $services);
foreach ( (array) $services as $service ) {
$service = trim($service);
if ( '' != $service )
weblog_ping($service);
}
return $post_id;
}
/**
* Pings back the links found in a post.
*
* @since 0.71
* @uses $wp_version
* @uses IXR_Client
*
* @param string $content Post content to check for links.
* @param int $post_ID Post ID.
*/
function pingback($content, $post_ID) {
global $wp_version;
include_once(ABSPATH . WPINC . '/class-IXR.php');
// original code by Mort (http://mort.mine.nu:8080)
$post_links = array();
$pung = get_pung($post_ID);
// Variables
$ltrs = '\w';
$gunk = '/#~:.?+=&%@!\-';
$punc = '.:?\-';
$any = $ltrs . $gunk . $punc;
// Step 1
// Parsing the post, external links (if any) are stored in the $post_links array
// This regexp comes straight from phpfreaks.com
// http://www.phpfreaks.com/quickcode/Extract_All_URLs_on_a_Page/15.php
preg_match_all("{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp);
// Step 2.
// Walking thru the links array
// first we get rid of links pointing to sites, not to specific files
// Example:
// http://dummy-weblog.org
// http://dummy-weblog.org/
// http://dummy-weblog.org/post.php
// We don't wanna ping first and second types, even if they have a valid <link/>
foreach ( (array) $post_links_temp[0] as $link_test ) :
if ( !in_array($link_test, $pung) && (url_to_postid($link_test) != $post_ID) // If we haven't pung it already and it isn't a link to itself
&& !is_local_attachment($link_test) ) : // Also, let's never ping local attachments.
if ( $test = @parse_url($link_test) ) {
if ( isset($test['query']) )
$post_links[] = $link_test;
elseif ( ($test['path'] != '/') && ($test['path'] != '') )
$post_links[] = $link_test;
}
endif;
endforeach;
do_action_ref_array('pre_ping', array(&$post_links, &$pung));
foreach ( (array) $post_links as $pagelinkedto ) {
$pingback_server_url = discover_pingback_server_uri($pagelinkedto, 2048);
if ( $pingback_server_url ) {
@ set_time_limit( 60 );
// Now, the RPC call
$pagelinkedfrom = get_permalink($post_ID);
// using a timeout of 3 seconds should be enough to cover slow servers
$client = new IXR_Client($pingback_server_url);
$client->timeout = 3;
$client->useragent .= ' -- WordPress/' . $wp_version;
// when set to true, this outputs debug messages by itself
$client->debug = false;
if ( $client->query('pingback.ping', $pagelinkedfrom, $pagelinkedto) || ( isset($client->error->code) && 48 == $client->error->code ) ) // Already registered
add_ping( $post_ID, $pagelinkedto );
}
}
}
/**
* Check whether blog is public before returning sites.
*
* @since 2.1.0
*
* @param mixed $sites Will return if blog is public, will not return if not public.
* @return mixed Empty string if blog is not public, returns $sites, if site is public.
*/
function privacy_ping_filter($sites) {
if ( '0' != get_option('blog_public') )
return $sites;
else
return '';
}
/**
* Send a Trackback.
*
* Updates database when sending trackback to prevent duplicates.
*
* @since 0.71
* @uses $wpdb
*
* @param string $trackback_url URL to send trackbacks.
* @param string $title Title of post.
* @param string $excerpt Excerpt of post.
* @param int $ID Post ID.
* @return mixed Database query from update.
*/
function trackback($trackback_url, $title, $excerpt, $ID) {
global $wpdb;
if ( empty($trackback_url) )
return;
$options = array();
$options['timeout'] = 4;
$options['body'] = array(
'title' => $title,
'url' => get_permalink($ID),
'blog_name' => get_option('blogname'),
'excerpt' => $excerpt
);
$response = wp_remote_post($trackback_url, $options);
if ( is_wp_error( $response ) )
return;
$tb_url = addslashes( $trackback_url );
$wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET pinged = CONCAT(pinged, '\n', '$tb_url') WHERE ID = %d", $ID) );
return $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, '$tb_url', '')) WHERE ID = %d", $ID) );
}
/**
* Send a pingback.
*
* @since 1.2.0
* @uses $wp_version
* @uses IXR_Client
*
* @param string $server Host of blog to connect to.
* @param string $path Path to send the ping.
*/
function weblog_ping($server = '', $path = '') {
global $wp_version;
include_once(ABSPATH . WPINC . '/class-IXR.php');
// using a timeout of 3 seconds should be enough to cover slow servers
$client = new IXR_Client($server, ((!strlen(trim($path)) || ('/' == $path)) ? false : $path));
$client->timeout = 3;
$client->useragent .= ' -- WordPress/'.$wp_version;
// when set to true, this outputs debug messages by itself
$client->debug = false;
$home = trailingslashit( get_option('home') );
if ( !$client->query('weblogUpdates.extendedPing', get_option('blogname'), $home, get_bloginfo('rss2_url') ) ) // then try a normal ping
$client->query('weblogUpdates.ping', get_option('blogname'), $home);
}
//
// Cache
//
/**
* Removes comment ID from the comment cache.
*
* @since 2.3.0
* @package WordPress
* @subpackage Cache
*
* @param int|array $id Comment ID or array of comment IDs to remove from cache
*/
function clean_comment_cache($ids) {
foreach ( (array) $ids as $id )
wp_cache_delete($id, 'comment');
}
/**
* Updates the comment cache of given comments.
*
* Will add the comments in $comments to the cache. If comment ID already exists
* in the comment cache then it will not be updated. The comment is added to the
* cache using the comment group with the key using the ID of the comments.
*
* @since 2.3.0
* @package WordPress
* @subpackage Cache
*
* @param array $comments Array of comment row objects
*/
function update_comment_cache($comments) {
foreach ( (array) $comments as $comment )
wp_cache_add($comment->comment_ID, $comment, 'comment');
}
//
// Internal
//
/**
* Close comments on old posts on the fly, without any extra DB queries. Hooked to the_posts.
*
* @access private
* @since 2.7.0
*
* @param object $posts Post data object.
* @return object
*/
function _close_comments_for_old_posts( $posts ) {
if ( empty($posts) || !is_singular() || !get_option('close_comments_for_old_posts') )
return $posts;
$days_old = (int) get_option('close_comments_days_old');
if ( !$days_old )
return $posts;
if ( time() - strtotime( $posts[0]->post_date_gmt ) > ( $days_old * 24 * 60 * 60 ) ) {
$posts[0]->comment_status = 'closed';
$posts[0]->ping_status = 'closed';
}
return $posts;
}
/**
* Close comments on an old post. Hooked to comments_open and pings_open.
*
* @access private
* @since 2.7.0
*
* @param bool $open Comments open or closed
* @param int $post_id Post ID
* @return bool $open
*/
function _close_comments_for_old_post( $open, $post_id ) {
if ( ! $open )
return $open;
if ( !get_option('close_comments_for_old_posts') )
return $open;
$days_old = (int) get_option('close_comments_days_old');
if ( !$days_old )
return $open;
$post = get_post($post_id);
if ( time() - strtotime( $post->post_date_gmt ) > ( $days_old * 24 * 60 * 60 ) )
return false;
return $open;
}
?>
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