Ticket #27933: wp-db.php.with_debug.patch

wp-includes/wp-db.php

@@ -1338 +1338 @@
                                 }
                         }
 
+                        // Persistent connections with mysqli are prepended with 'p:', supported on PHP5.3+
+                        if ( ! $new_link ){
+                                if ( version_compare(PHP_VERSION, '5.3.0') >= 0 ){
+                                        $host = "p:$host";
+                                } elseif ( WP_DEBUG ){
+                                        _e( 'MySQLi persistent connections are not supported with your version of PHP.' );
+                                }
+                        }
+
                         if ( WP_DEBUG ) {
                                 mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags );
                         } else {