pg_ping

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

pg_pingPing 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().

警告

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 资源(resource)
8.0.0 connection 现在可为 null。

示例

示例 #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

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