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PHP5中文手册
mysqli_pingmysqli->ping()(PHP 5) mysqli->ping() — Pings a server connection, or tries to reconnect if the connection has gone down 说明Procedural style:
bool mysqli_ping
( mysqli $link
)
Object oriented style (method): mysqli
bool ping
( void
)
Checks whether the connection to the server is working. If it has gone down, and global option mysqli.reconnect is enabled an automatic reconnection is attempted. This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and reconnect if necessary. 返回值如果成功则返回 TRUE,失败则返回 FALSE。 范例Example#1 Object oriented style
<?php Example#2 Procedural style
<?php 上例将输出:
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