pg_ping

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

pg_ping — Ping 数据库连接

说明

pg_ping(?PgSql\Connection $connection = null): bool

pg_ping() ping 数据库连接，如果中断则尝试重新连接。

参数

connection

An PgSql\Connection instance. When connection is null, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

Warning

As of PHP 8.1.0, using the default connection is deprecated.

返回值

成功时返回 true， 或者在失败时返回 false。

更新日志

版本 说明
8.1.0 现在 connection 参数接受 PgSql\Connection 实例，之前接受 resource。
8.0.0 connection 现在可为 null。

示例

Example #1 pg_ping() 示例

<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}

if (!pg_ping($conn))
die("Connection is broken\n");
?>

参见