Php/docs/mysqlnduhconnection.ping
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 $connection
) : bool
Pings a server connection, or tries to reconnect if the connection has gone down.
参数
connection- Mysqlnd connection handle. Do not modify!
返回值
Returns true on success.
Otherwise, returns false
范例
Example #1 MysqlndUhConnection::ping() example
<?phpclass proxy extends MysqlndUhConnection { public function ping($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() - ping 一个连接，或者如果连接处于断开状态，重新连接
- mysql_ping() - Ping 一个服务器连接，如果没有连接则重新连接
