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