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
$connection
) : boolPings a server connection, or tries to reconnect if the connection has gone down.
参数
-
connection -
Mysqlnd connection handle. Do not modify!
返回值
Returns true on success.
Otherwise, returns false
范例
示例 #1 MysqlndUhConnection::ping() example
<?php
class proxy extends MysqlndUhConnection {
public function ping($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() - 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
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