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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
314 | } |
315 | if ( '' !== $parent ) |
316 | $where .= $wpdb->prepare( ' AND comment_parent = %d', $parent ); |
317 | if ( '' !== $user_id ) |
318 | $where .= $wpdb->prepare( ' AND user_id = %d', $user_id ); |
319 | if ( '' !== $search ) |
320 | $where .= $this->get_search_sql( $search, array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_content' ) ); |
321 |
|
322 | $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' ); |
323 | $clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) ); |
324 | foreach ( $pieces as $piece ) |
325 | $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : ''; |
326 |
|
327 | $query = "SELECT $fields FROM $wpdb->comments $join WHERE $where ORDER BY $orderby $order $limits"; |
328 |
|
329 | if ( $count ) |
330 | return $wpdb->get_var( $query ); |
331 |
|
332 | $comments = $wpdb->get_results( $query ); |