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 bool MysqlndUhConnection::ping ( mysqlnd_connection $connection )

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

mysqlnd_uh_set_connection_proxy() - Installs a proxy for mysqlnd connections
mysqli_ping() - Pings a server connection, or tries to reconnect if the connection has gone down
mysql_ping() - Ping 一个服务器连接，如果没有连接则重新连接