+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;
+
+ /**
+ * Query vars set by the user.
+ *
+ * @since 3.1.0
+ * @access public
+ * @var array
+ */
+ public $query_vars;
+
+ /**
+ * Default values for query vars.
+ *
+ * @since 4.2.0
+ * @access public
+ * @var array
+ */
+ public $query_var_defaults;
+
+ /**
+ * List of comments located by the query.
+ *
+ * @since 4.0.0
+ * @access public
+ * @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 ) {
+ if ( 'get_search_sql' === $name ) {
+ return call_user_func_array( array( $this, $name ), $arguments );
+ }
+ return false;
+ }
+
+ /**
+ * Constructor.
+ *
+ * Sets up the comment query, based on the query vars passed.
+ *
+ * @since 4.2.0
+ * @access public
+ *
+ * @param string|array $query {
+ * Optional. Array or query string of comment query parameters. Default empty.
+ *
+ * @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 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 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 $orderby Comment status or array of statuses. To use 'meta_value' or
+ * 'meta_value_num', `$meta_key` must also be defined. To sort by
+ * a specific `$meta_query` clause, use that clause's array key.
+ * 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', the value of $meta_key, and the
+ * array keys of `$meta_query`. Also accepts false, an 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 WP_Comment_Query WP_Comment_Query instance.
+ */
+ public function __construct( $query = '' ) {
+ $this->query_var_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
+ );
+
+ if ( ! empty( $query ) ) {
+ $this->query( $query );
+ }
+ }
+
+ /**
+ * Parse arguments passed to the comment query with default query parameters.
+ *
+ * @since 4.2.0 Extracted from WP_Comment_Query::query().
+ *
+ * @access public
+ *
+ * @param string|array $query WP_Comment_Query arguments. See WP_Comment_Query::__construct()
+ */
+ public function parse_query( $query = '' ) {
+ if ( empty( $query ) ) {
+ $query = $this->query_vars;
+ }
+
+ $this->query_vars = wp_parse_args( $query, $this->query_var_defaults );
+ do_action_ref_array( 'parse_comment_query', array( &$this ) );
+ }
+
+ /**
+ * Sets up the WordPress query for retrieving comments.
+ *
+ * @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.
+ * @since 4.2.0 Moved parsing to WP_Comment_Query::parse_query().
+ * @access public
+ *
+ * @param string|array $query Array or URL query string of parameters.
+ * @return array List of comments.
+ */
+ public function query( $query ) {
+ $this->query_vars = wp_parse_args( $query );
+ return $this->get_comments();
+ }
+
+ /**
+ * Get a list of comments matching the query vars.
+ *
+ * @since 4.2.0
+ * @access public
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @return array The list of comments.
+ */
+ public function get_comments() {
+ global $wpdb;
+
+ $groupby = '';
+
+ $this->parse_query();
+
+ // Parse meta query
+ $this->meta_query = new WP_Meta_Query();
+ $this->meta_query->parse_query_vars( $this->query_vars );
+
+ if ( ! empty( $this->meta_query->queries ) ) {
+ $meta_query_clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this );
+ }
+
+ /**
+ * Fires before comments are retrieved.
+ *
+ * @since 3.1.0
+ *
+ * @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.
+ */
+ do_action_ref_array( 'pre_get_comments', array( &$this ) );
+
+ // $args can include anything. Only use the args defined in the query_var_defaults to compute the key.
+ $key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_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' ) ) {
+ $this->comments = $cache;
+ return $this->comments;
+ }
+
+ $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 = '';
+ } elseif ( ! empty( $this->query_vars['orderby'] ) ) {
+ $ordersby = is_array( $this->query_vars['orderby'] ) ?
+ $this->query_vars['orderby'] :
+ preg_split( '/[,\s]/', $this->query_vars['orderby'] );
+
+ $orderby_array = array();
+ $found_orderby_comment_ID = false;
+ foreach ( $ordersby as $_key => $_value ) {
+ if ( ! $_value ) {
+ continue;
+ }
+
+ if ( is_int( $_key ) ) {
+ $_orderby = $_value;
+ $_order = $order;
+ } else {
+ $_orderby = $_key;
+ $_order = $_value;
+ }
+
+ if ( ! $found_orderby_comment_ID && 'comment_ID' === $_orderby ) {
+ $found_orderby_comment_ID = true;
+ }
+
+ $parsed = $this->parse_orderby( $_orderby );
+
+ if ( ! $parsed ) {
+ continue;
+ }
+
+ $orderby_array[] = $parsed . ' ' . $this->parse_order( $_order );
+ }
+
+ // If no valid clauses were found, order by comment_date_gmt.
+ if ( empty( $orderby_array ) ) {
+ $orderby_array[] = "$wpdb->comments.comment_date_gmt $order";
+ }
+
+ // To ensure determinate sorting, always include a comment_ID clause.
+ if ( ! $found_orderby_comment_ID ) {
+ $comment_ID_order = '';
+
+ // Inherit order from comment_date or comment_date_gmt, if available.
+ foreach ( $orderby_array as $orderby_clause ) {
+ if ( preg_match( '/comment_date(?:_gmt)*\ (ASC|DESC)/', $orderby_clause, $match ) ) {
+ $comment_ID_order = $match[1];
+ break;
+ }
+ }
+
+ // If no date-related order is available, use the date from the first available clause.
+ if ( ! $comment_ID_order ) {
+ foreach ( $orderby_array as $orderby_clause ) {
+ if ( false !== strpos( 'ASC', $orderby_clause ) ) {
+ $comment_ID_order = 'ASC';
+ } else {
+ $comment_ID_order = 'DESC';
+ }
+
+ break;
+ }
+ }
+
+ // Default to DESC.
+ if ( ! $comment_ID_order ) {
+ $comment_ID_order = 'DESC';
+ }
+
+ $orderby_array[] = "$wpdb->comments.comment_ID $comment_ID_order";
+ }
+
+ $orderby = implode( ', ', $orderby_array );
+ } else {
+ $orderby = "$wpdb->comments.comment_date_gmt $order";
+ }
+
+ $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 ) {
+ // $field_value may be an array.
+ $esses = array_fill( 0, count( (array) $field_value ), '%s' );
+ $where[] = $wpdb->prepare( " {$wpdb->posts}.{$field_name} IN (" . implode( ',', $esses ) . ')', $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( $meta_query_clauses ) ) {
+ $join .= $meta_query_clauses['join'];
+
+ // Strip leading 'AND'.
+ $where[] = preg_replace( '/^\s*AND\s*/', '', $meta_query_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', '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' ] : '';
+ $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";
+ }
+
+ $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' );
+
+ $this->comments = $comments;
+ return $this->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) . ')';
+ }
+
+ /**
+ * Parse and sanitize 'orderby' keys passed to the comment query.
+ *
+ * @since 4.2.0
+ * @access protected
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param string $orderby Alias for the field to order by.
+ * @return string|bool Value to used in the ORDER clause. False otherwise.
+ */
+ protected function parse_orderby( $orderby ) {
+ global $wpdb;
+
+ $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';
+ }
+
+ $meta_query_clauses = $this->meta_query->get_clauses();
+ if ( $meta_query_clauses ) {
+ $allowed_keys = array_merge( $allowed_keys, array_keys( $meta_query_clauses ) );
+ }
+
+ $parsed = false;
+ if ( $orderby == $this->query_vars['meta_key'] || $orderby == 'meta_value' ) {
+ $parsed = "$wpdb->commentmeta.meta_value";
+ } else if ( $orderby == 'meta_value_num' ) {
+ $parsed = "$wpdb->commentmeta.meta_value+0";
+ } else if ( in_array( $orderby, $allowed_keys ) ) {
+
+ if ( isset( $meta_query_clauses[ $orderby ] ) ) {
+ $meta_clause = $meta_query_clauses[ $orderby ];
+ $parsed = sprintf( "CAST(%s.meta_value AS %s)", esc_sql( $meta_clause['alias'] ), esc_sql( $meta_clause['cast'] ) );
+ } else {
+ $parsed = "$wpdb->comments.$orderby";
+ }
+ }
+
+ return $parsed;
+ }
+
+ /**
+ * Parse an 'order' query variable and cast it to ASC or DESC as necessary.
+ *
+ * @since 4.2.0
+ * @access protected
+ *
+ * @param string $order The 'order' query variable.
+ * @return string The sanitized 'order' query variable.
+ */
+ protected function parse_order( $order ) {
+ if ( ! is_string( $order ) || empty( $order ) ) {
+ return 'DESC';
+ }
+
+ if ( 'ASC' === strtoupper( $order ) ) {
+ return 'ASC';
+ } else {
+ return 'DESC';
+ }
+ }
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