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comment.php
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2847 lines (2501 loc) · 91.6 KB
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<?php
/**
* Manages WordPress comments
*
* @package WordPress
* @subpackage Comment
*/
/**
* Check whether a comment passes internal checks to be allowed to add.
*
* If manual comment moderation is set in the administration, then all checks,
* regardless of their type and whitelist, will fail and the function will
* return 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 comment author was approved before, then the comment is automatically
* whitelisted.
*
* If all checks pass, the function will return true.
*
* @since 1.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $author Comment author name.
* @param string $email Comment author email.
* @param string $url Comment author URL.
* @param string $comment Content of the comment.
* @param string $user_ip Comment author IP address.
* @param string $user_agent Comment author User-Agent.
* @param string $comment_type Comment type, either user-submitted comment,
* trackback, or pingback.
* @return bool If all checks pass, true, otherwise false.
*/
function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $comment_type) {
global $wpdb;
// If manual moderation is enabled, skip all checks and return false.
if ( 1 == get_option('comment_moderation') )
return false;
/** This filter is documented in wp-includes/comment-template.php */
$comment = apply_filters( 'comment_text', $comment );
// Check for the number of external links if a max allowed number is set.
if ( $max_links = get_option( 'comment_max_links' ) ) {
$num_links = preg_match_all( '/<a [^>]*href/i', $comment, $out );
/**
* Filter the maximum number of links allowed in a comment.
*
* @since 3.0.0
*
* @param int $num_links The number of links allowed.
* @param string $url Comment author's URL. Included in allowed links total.
*/
$num_links = apply_filters( 'comment_max_links_url', $num_links, $url );
/*
* If the number of links in the comment exceeds the allowed amount,
* fail the check by returning false.
*/
if ( $num_links >= $max_links )
return false;
}
$mod_keys = trim(get_option('moderation_keys'));
// If moderation 'keys' (keywords) are set, process them.
if ( !empty($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 '#' (number of) characters in the spam
* words don't break things:
*/
$word = preg_quote($word, '#');
/*
* Check the comment fields for moderation keywords. If any are found,
* fail the check for the given field by returning false.
*/
$pattern = "#$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;
}
}
/*
* Check if the option to approve comments by previously-approved authors is enabled.
*
* If it is enabled, check whether the comment author has a previously-approved comment,
* as well as whether there are any moderation keywords (if set) present in the author
* email address. If both checks pass, return true. Otherwise, return false.
*/
if ( 1 == get_option('comment_whitelist')) {
if ( 'trackback' != $comment_type && 'pingback' != $comment_type && $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
* @since 4.1.0 Refactored to leverage {@see WP_Comment_Query} over a direct query.
*
* @param int $post_id The ID of the post.
* @param array $args Optional. See {@see WP_Comment_Query::query()} for information
* on accepted arguments.
* @return int|array $comments The approved comments, or number of comments if `$count`
* argument is true.
*/
function get_approved_comments( $post_id, $args = array() ) {
if ( ! $post_id ) {
return array();
}
$defaults = array(
'status' => 1,
'post_id' => $post_id,
'order' => 'ASC',
);
$r = wp_parse_args( $args, $defaults );
$query = new WP_Comment_Query;
return $query->query( $r );
}
/**
* 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.
*
* @since 2.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @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 $wpdb;
if ( empty($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');
}
}
/**
* Fires after a comment is retrieved.
*
* @since 2.3.0
*
* @param mixed $_comment Comment data.
*/
$_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.
*
* @since 2.7.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string|array $args Optional. Array or string of arguments. See {@see WP_Comment_Query::query()}
* for information on accepted arguments. Default empty.
* @return int|array List of comments or number of found comments if `$count` argument is true.
*/
function get_comments( $args = '' ) {
$query = new WP_Comment_Query;
return $query->query( $args );
}
/**
* WordPress Comment Query class.
*
* See {@see WP_Comment_Query::query()} for accepted arguments.
*
* @since 3.1.0
*/
class WP_Comment_Query {
/**
* SQL for database query.
*
* @since 4.0.1
* @access public
* @var string
*/
public $request;
/**
* Metadata query container
*
* @since 3.5.0
* @access public
* @var object WP_Meta_Query
*/
public $meta_query = false;
/**
* Date query container
*
* @since 3.7.0
* @access public
* @var object WP_Date_Query
*/
public $date_query = false;
/**
* @var array
*/
public $query_vars;
/**
* @var array
*/
public $comments;
/**
* Make private/protected methods readable for backwards compatibility.
*
* @since 4.0.0
* @access public
*
* @param callable $name Method to call.
* @param array $arguments Arguments to pass when calling.
* @return mixed|bool Return value of the callback, false otherwise.
*/
public function __call( $name, $arguments ) {
return call_user_func_array( array( $this, $name ), $arguments );
}
/**
* Execute the query
*
* @since 3.1.0
* @since 4.1.0 Introduced 'comment__in', 'comment__not_in', 'post_author__in',
* 'post_author__not_in', 'author__in', 'author__not_in', 'post__in',
* 'post__not_in', 'include_unapproved', 'type__in', and 'type__not_in'
* arguments to $query_vars.
*
* @param string|array $query_vars {
* Optional. Array or query string of comment query parameters.
*
* @type string $author_email Comment author email address. Default empty.
* @type array $author__in Array of author IDs to include comments for. Default empty.
* @type array $author__not_in Array of author IDs to exclude comments for. Default empty.
* @type array $comment__in Array of comment IDs to include. Default empty.
* @type array $comment__not_in Array of comment IDs to exclude. Default empty.
* @type bool $count Whether to return a comment count (true) or array of comment
* objects (false). Default false.
* @type array $date_query Date query clauses to limit comments by. See {@see WP_Date_Query}.
* Default null.
* @type string $fields Comment fields to return. Accepts 'ids' for comment IDs only or
* empty for all fields. Default empty.
* @type int $ID Currently unused.
* @type array $include_unapproved Array of IDs or email addresses of users whose unapproved comments
* will be returned by the query regardless of `$status`. Default empty.
* @type int $karma Karma score to retrieve matching comments for. Default empty.
* @type string $meta_key Include comments with a matching comment meta key. Default empty.
* @type string $meta_value Include comments with a matching comment meta value. Requires
* `$meta_key` to be set. Default empty.
* @type array $meta_query Meta query clauses to limit retrieved comments by.
* See {@see WP_Meta_Query}. Default empty.
* @type int $number Maximum number of comments to retrieve. Default null (no limit).
* @type int $offset Number of comments to offset the query. Used to build LIMIT clause.
* Default 0.
* @type string|array $orderby Comment status or array of statuses. Accepts 'comment_agent',
* 'comment_approved', 'comment_author', 'comment_author_email',
* 'comment_author_IP', 'comment_author_url', 'comment_content',
* 'comment_date', 'comment_date_gmt', 'comment_ID', 'comment_karma',
* 'comment_parent', 'comment_post_ID', 'comment_type', 'user_id',
* 'meta_value', 'meta_value_num', or value of $meta_key.
* Also accepts false, empty array, or 'none' to disable `ORDER BY`
* clause. Default: 'comment_date_gmt'.
* @type string $order How to order retrieved comments. Accepts 'ASC', 'DESC'.
* Default: 'DESC'.
* @type int $parent Parent ID of comment to retrieve children of. Default empty.
* @type array $post_author__in Array of author IDs to retrieve comments for. Default empty.
* @type array $post_author__not_in Array of author IDs *not* to retrieve comments for. Default empty.
* @type int $post_ID Currently unused.
* @type int $post_id Limit results to those affiliated with a given post ID. Default 0.
* @type array $post__in Array of post IDs to include affiliated comments for. Default empty.
* @type array $post__not_in Array of post IDs to exclude affiliated comments for. Default empty.
* @type int $post_author Comment author ID to limit results by. Default empty.
* @type string $post_status Post status to retrieve affiliated comments for. Default empty.
* @type string $post_type Post type to retrieve affiliated comments for. Default empty.
* @type string $post_name Post name to retrieve affiliated comments for. Default empty.
* @type int $post_parent Post parent ID to retrieve affiliated comments for. Default empty.
* @type string $search Search term(s) to retrieve matching comments for. Default empty.
* @type string $status Comment status to limit results by. Accepts 'hold'
* (`comment_status=0`), 'approve' (`comment_status=1`), 'all', or a
* custom comment status. Default 'all'.
* @type string|array $type Include comments of a given type, or array of types. Accepts
* 'comment', 'pings' (includes 'pingback' and 'trackback'), or any
* custom type string. Default empty.
* @type array $type__in Include comments from a given array of comment types. Default empty.
* @type array $type__not_in Exclude comments from a given array of comment types. Default empty.
* @type int $user_id Include comments for a specific user ID. Default empty.
* }
* @return int|array Array of comments or number of found comments if `$count` is set to true.
*/
public function query( $query_vars ) {
global $wpdb;
$defaults = array(
'author_email' => '',
'author__in' => '',
'author__not_in' => '',
'include_unapproved' => '',
'fields' => '',
'ID' => '',
'comment__in' => '',
'comment__not_in' => '',
'karma' => '',
'number' => '',
'offset' => '',
'orderby' => '',
'order' => 'DESC',
'parent' => '',
'post_author__in' => '',
'post_author__not_in' => '',
'post_ID' => '',
'post_id' => 0,
'post__in' => '',
'post__not_in' => '',
'post_author' => '',
'post_name' => '',
'post_parent' => '',
'post_status' => '',
'post_type' => '',
'status' => 'all',
'type' => '',
'type__in' => '',
'type__not_in' => '',
'user_id' => '',
'search' => '',
'count' => false,
'meta_key' => '',
'meta_value' => '',
'meta_query' => '',
'date_query' => null, // See WP_Date_Query
);
$groupby = '';
$this->query_vars = wp_parse_args( $query_vars, $defaults );
// Parse meta query
$this->meta_query = new WP_Meta_Query();
$this->meta_query->parse_query_vars( $this->query_vars );
/**
* Fires before comments are retrieved.
*
* @since 3.1.0
*
* @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.
*/
do_action_ref_array( 'pre_get_comments', array( &$this ) );
// $args can be whatever, only use the args defined in defaults to compute the key
$key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $defaults ) ) ) );
$last_changed = wp_cache_get( 'last_changed', 'comment' );
if ( ! $last_changed ) {
$last_changed = microtime();
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;
}
$where = array();
// Assemble clauses related to 'comment_approved'.
$approved_clauses = array();
// 'status' accepts an array or a comma-separated string.
$status_clauses = array();
$statuses = $this->query_vars['status'];
if ( ! is_array( $statuses ) ) {
$statuses = preg_split( '/[\s,]+/', $statuses );
}
// 'any' overrides other statuses.
if ( ! in_array( 'any', $statuses ) ) {
foreach ( $statuses as $status ) {
switch ( $status ) {
case 'hold' :
$status_clauses[] = "comment_approved = '0'";
break;
case 'approve' :
$status_clauses[] = "comment_approved = '1'";
break;
case 'all' :
case '' :
$status_clauses[] = "( comment_approved = '0' OR comment_approved = '1' )";
break;
default :
$status_clauses[] = $wpdb->prepare( "comment_approved = %s", $status );
break;
}
}
if ( ! empty( $status_clauses ) ) {
$approved_clauses[] = '( ' . implode( ' OR ', $status_clauses ) . ' )';
}
}
// User IDs or emails whose unapproved comments are included, regardless of $status.
if ( ! empty( $this->query_vars['include_unapproved'] ) ) {
$include_unapproved = $this->query_vars['include_unapproved'];
// Accepts arrays or comma-separated strings.
if ( ! is_array( $include_unapproved ) ) {
$include_unapproved = preg_split( '/[\s,]+/', $include_unapproved );
}
$unapproved_ids = $unapproved_emails = array();
foreach ( $include_unapproved as $unapproved_identifier ) {
// Numeric values are assumed to be user ids.
if ( is_numeric( $unapproved_identifier ) ) {
$approved_clauses[] = $wpdb->prepare( "( user_id = %d AND comment_approved = '0' )", $unapproved_identifier );
// Otherwise we match against email addresses.
} else {
$approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' )", $unapproved_identifier );
}
}
}
// Collapse comment_approved clauses into a single OR-separated clause.
if ( ! empty( $approved_clauses ) ) {
if ( 1 === count( $approved_clauses ) ) {
$where[] = $approved_clauses[0];
} else {
$where[] = '( ' . implode( ' OR ', $approved_clauses ) . ' )';
}
}
$order = ( 'ASC' == strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC';
// Disable ORDER BY with 'none', an empty array, or boolean false.
if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) {
$orderby = '';
} else if ( ! empty( $this->query_vars['orderby'] ) ) {
$ordersby = is_array( $this->query_vars['orderby'] ) ?
$this->query_vars['orderby'] :
preg_split( '/[,\s]/', $this->query_vars['orderby'] );
$allowed_keys = array(
'comment_agent',
'comment_approved',
'comment_author',
'comment_author_email',
'comment_author_IP',
'comment_author_url',
'comment_content',
'comment_date',
'comment_date_gmt',
'comment_ID',
'comment_karma',
'comment_parent',
'comment_post_ID',
'comment_type',
'user_id',
);
if ( ! empty( $this->query_vars['meta_key'] ) ) {
$allowed_keys[] = $this->query_vars['meta_key'];
$allowed_keys[] = 'meta_value';
$allowed_keys[] = 'meta_value_num';
}
$ordersby = array_intersect( $ordersby, $allowed_keys );
foreach ( $ordersby as $key => $value ) {
if ( $value == $this->query_vars['meta_key'] || $value == 'meta_value' ) {
$ordersby[ $key ] = "$wpdb->commentmeta.meta_value";
} elseif ( $value == 'meta_value_num' ) {
$ordersby[ $key ] = "$wpdb->commentmeta.meta_value+0";
}
}
$orderby = empty( $ordersby ) ? 'comment_date_gmt' : implode(', ', $ordersby);
} else {
$orderby = 'comment_date_gmt';
}
$number = absint( $this->query_vars['number'] );
$offset = absint( $this->query_vars['offset'] );
if ( ! empty( $number ) ) {
if ( $offset ) {
$limits = 'LIMIT ' . $offset . ',' . $number;
} else {
$limits = 'LIMIT ' . $number;
}
} else {
$limits = '';
}
if ( $this->query_vars['count'] ) {
$fields = 'COUNT(*)';
} else {
switch ( strtolower( $this->query_vars['fields'] ) ) {
case 'ids':
$fields = "$wpdb->comments.comment_ID";
break;
default:
$fields = "*";
break;
}
}
$join = '';
$post_id = absint( $this->query_vars['post_id'] );
if ( ! empty( $post_id ) ) {
$where[] = $wpdb->prepare( 'comment_post_ID = %d', $post_id );
}
// Parse comment IDs for an IN clause.
if ( ! empty( $this->query_vars['comment__in'] ) ) {
$where[] = 'comment_ID IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['comment__in'] ) ) . ' )';
}
// Parse comment IDs for a NOT IN clause.
if ( ! empty( $this->query_vars['comment__not_in'] ) ) {
$where[] = 'comment_ID NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['comment__not_in'] ) ) . ' )';
}
// Parse comment post IDs for an IN clause.
if ( ! empty( $this->query_vars['post__in'] ) ) {
$where[] = 'comment_post_ID IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post__in'] ) ) . ' )';
}
// Parse comment post IDs for a NOT IN clause.
if ( ! empty( $this->query_vars['post__not_in'] ) ) {
$where[] = 'comment_post_ID NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post__not_in'] ) ) . ' )';
}
if ( '' !== $this->query_vars['author_email'] ) {
$where[] = $wpdb->prepare( 'comment_author_email = %s', $this->query_vars['author_email'] );
}
if ( '' !== $this->query_vars['karma'] ) {
$where[] = $wpdb->prepare( 'comment_karma = %d', $this->query_vars['karma'] );
}
// Filtering by comment_type: 'type', 'type__in', 'type__not_in'.
$raw_types = array(
'IN' => array_merge( (array) $this->query_vars['type'], (array) $this->query_vars['type__in'] ),
'NOT IN' => (array) $this->query_vars['type__not_in'],
);
$comment_types = array();
foreach ( $raw_types as $operator => $_raw_types ) {
$_raw_types = array_unique( $_raw_types );
foreach ( $_raw_types as $type ) {
switch ( $type ) {
// An empty translates to 'all', for backward compatibility
case '':
case 'all' :
break;
case 'comment':
case 'comments':
$comment_types[ $operator ][] = "''";
break;
case 'pings':
$comment_types[ $operator ][] = "'pingback'";
$comment_types[ $operator ][] = "'trackback'";
break;
default:
$comment_types[ $operator ][] = $wpdb->prepare( '%s', $type );
break;
}
}
if ( ! empty( $comment_types[ $operator ] ) ) {
$types_sql = implode( ', ', $comment_types[ $operator ] );
$where[] = "comment_type $operator ($types_sql)";
}
}
if ( '' !== $this->query_vars['parent'] ) {
$where[] = $wpdb->prepare( 'comment_parent = %d', $this->query_vars['parent'] );
}
if ( is_array( $this->query_vars['user_id'] ) ) {
$where[] = 'user_id IN (' . implode( ',', array_map( 'absint', $this->query_vars['user_id'] ) ) . ')';
} elseif ( '' !== $this->query_vars['user_id'] ) {
$where[] = $wpdb->prepare( 'user_id = %d', $this->query_vars['user_id'] );
}
if ( '' !== $this->query_vars['search'] ) {
$search_sql = $this->get_search_sql(
$this->query_vars['search'],
array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_content' )
);
// Strip leading 'AND'.
$where[] = preg_replace( '/^\s*AND\s*/', '', $search_sql );
}
// If any post-related query vars are passed, join the posts table.
$join_posts_table = false;
$plucked = wp_array_slice_assoc( $this->query_vars, array( 'post_author', 'post_name', 'post_parent', 'post_status', 'post_type' ) );
$post_fields = array_filter( $plucked );
if ( ! empty( $post_fields ) ) {
$join_posts_table = true;
foreach ( $post_fields as $field_name => $field_value ) {
$where[] = $wpdb->prepare( " {$wpdb->posts}.{$field_name} = %s", $field_value );
}
}
// Comment author IDs for an IN clause.
if ( ! empty( $this->query_vars['author__in'] ) ) {
$where[] = 'user_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['author__in'] ) ) . ' )';
}
// Comment author IDs for a NOT IN clause.
if ( ! empty( $this->query_vars['author__not_in'] ) ) {
$where[] = 'user_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['author__not_in'] ) ) . ' )';
}
// Post author IDs for an IN clause.
if ( ! empty( $this->query_vars['post_author__in'] ) ) {
$join_posts_table = true;
$where[] = 'post_author IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post_author__in'] ) ) . ' )';
}
// Post author IDs for a NOT IN clause.
if ( ! empty( $this->query_vars['post_author__not_in'] ) ) {
$join_posts_table = true;
$where[] = 'post_author NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post_author__not_in'] ) ) . ' )';
}
if ( $join_posts_table ) {
$join = "JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID";
}
if ( ! empty( $this->meta_query->queries ) ) {
$clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this );
$join .= $clauses['join'];
// Strip leading 'AND'.
$where[] = preg_replace( '/^\s*AND\s*/', '', $clauses['where'] );
if ( ! $this->query_vars['count'] ) {
$groupby = "{$wpdb->comments}.comment_ID";
}
}
$date_query = $this->query_vars['date_query'];
if ( ! empty( $date_query ) && is_array( $date_query ) ) {
$date_query_object = new WP_Date_Query( $date_query, 'comment_date' );
$where[] = preg_replace( '/^\s*AND\s*/', '', $date_query_object->get_sql() );
}
$where = implode( ' AND ', $where );
$pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits', 'groupby' );
/**
* Filter the comment query clauses.
*
* @since 3.1.0
*
* @param array $pieces A compacted array of comment query clauses.
* @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.
*/
$clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );
$fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';
$join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';
$where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';
$orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';
$order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : '';
$limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';
$groupby = isset( $clauses[ 'groupby' ] ) ? $clauses[ 'groupby' ] : '';
if ( $where ) {
$where = 'WHERE ' . $where;
}
if ( $groupby ) {
$groupby = 'GROUP BY ' . $groupby;
}
if ( $orderby ) {
$orderby = "ORDER BY $orderby $order";
}
$this->request = "SELECT $fields FROM $wpdb->comments $join $where $groupby $orderby $limits";
if ( $this->query_vars['count'] ) {
return $wpdb->get_var( $this->request );
}
if ( 'ids' == $this->query_vars['fields'] ) {
$this->comments = $wpdb->get_col( $this->request );
return array_map( 'intval', $this->comments );
}
$results = $wpdb->get_results( $this->request );
/**
* Filter the comment query results.
*
* @since 3.1.0
*
* @param array $results An array of comments.
* @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.
*/
$comments = apply_filters_ref_array( 'the_comments', array( $results, &$this ) );
wp_cache_add( $cache_key, $comments, 'comment' );
return $comments;
}
/**
* Used internally to generate an SQL string for searching across multiple columns
*
* @access protected
* @since 3.1.0
*
* @param string $string
* @param array $cols
* @return string
*/
protected function get_search_sql( $string, $cols ) {
global $wpdb;
$like = '%' . $wpdb->esc_like( $string ) . '%';
$searches = array();
foreach ( $cols as $col ) {
$searches[] = $wpdb->prepare( "$col LIKE %s", $like );
}
return ' AND (' . implode(' OR ', $searches) . ')';
}
}
/**
* 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.
*
* @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
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @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 $wpdb;
static $cache_lastcommentmodified = array();
if ( isset($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
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @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.
*
* @since 2.9.0
* @link http://codex.wordpress.org/Function_Reference/add_comment_meta
*
* @param int $comment_id Comment ID.
* @param string $meta_key Metadata name.
* @param mixed $meta_value Metadata value.
* @param bool $unique Optional, default is false. Whether the same key should not be added.
* @return int|bool Meta ID on success, false on failure.
*/
function add_comment_meta($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 2.9.0
* @link http://codex.wordpress.org/Function_Reference/delete_comment_meta
*
* @param int $comment_id comment ID
* @param string $meta_key Metadata name.
* @param mixed $meta_value Optional. Metadata value.
* @return bool True on success, false on failure.
*/
function delete_comment_meta($comment_id, $meta_key, $meta_value = '') {
return delete_metadata('comment', $comment_id, $meta_key, $meta_value);
}
/**
* Retrieve comment meta field for a comment.
*
* @since 2.9.0
* @link http://codex.wordpress.org/Function_Reference/get_comment_meta
*
* @param int $comment_id Comment ID.
* @param string $key Optional. The meta key to retrieve. By default, returns data for all keys.
* @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 2.9.0
* @link http://codex.wordpress.org/Function_Reference/update_comment_meta
*
* @param int $comment_id Comment ID.
* @param string $meta_key Metadata key.
* @param mixed $meta_value Metadata value.
* @param mixed $prev_value Optional. Previous value to check before removing.
* @return int|bool Meta ID if the key didn't exist, true on successful update, false on failure.
*/
function update_comment_meta($comment_id, $meta_key, $meta_value, $prev_value = '') {