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    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().

    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 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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