MysqlndUhConnection::ping

(PECL mysqlnd-uh >= 1.0.0-alpha)

MysqlndUhConnection::ping — Pings a server connection, or tries to reconnect if the connection has gone down

说明

public MysqlndUhConnection::ping ( mysqlnd_connection $connection ) : bool

Pings a server connection, or tries to reconnect if the connection has gone down.

参数

connection

Mysqlnd connection handle. Do not modify!

返回值

Returns TRUE on success. Otherwise, returns FALSE

范例

Example #1 MysqlndUhConnection::ping() example

<?php
class proxy extends MysqlndUhConnection {
 public function ping($res) {
  printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));
  $ret = parent::ping($res);
  printf("%s returns %s\n", __METHOD__, var_export($ret, true));
  return $ret;
 }
}
mysqlnd_uh_set_connection_proxy(new proxy());

$mysqli = new mysqli("localhost", "root", "", "test");
$mysqli->ping();
?>

以上例程会输出：

proxy::ping(array (
  0 => NULL,
))
proxy::ping returns true

参见