Returns the ReadPreference's "maxStalenessSeconds" option

# MongoDB\Driver\ReadPreference::getMaxStalenessSeconds

(mongodb >=1.2.0)

MongoDB\Driver\ReadPreference::getMaxStalenessSeconds — Returns the ReadPreference's "maxStalenessSeconds" option

### 说明

final public function MongoDB\Driver\ReadPreference::getMaxStalenessSeconds(): int

### 参数

此函数没有参数。

### 返回值

Returns the ReadPreference's "maxStalenessSeconds" option. If no max staleness has been specified, `MongoDB\Driver\ReadPreference::NO_MAX_STALENESS` will be returned.

### 错误／异常

- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

### 示例

示例 #1 MongoDB\Driver\ReadPreference::getMaxStalenessSeconds() example

    <?php

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::SECONDARY);
    var_dump($rp->getMaxStalenessSeconds());

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::SECONDARY, null, [
        'maxStalenessSeconds' => MongoDB\Driver\ReadPreference::NO_MAX_STALENESS,
    ]);
    var_dump($rp->getMaxStalenessSeconds());

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::SECONDARY, null, [
        'maxStalenessSeconds' => MongoDB\Driver\ReadPreference::SMALLEST_MAX_STALENESS_SECONDS,
    ]);
    var_dump($rp->getMaxStalenessSeconds());

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::SECONDARY, null, [
        'maxStalenessSeconds' => 1000,
    ]);
    var_dump($rp->getMaxStalenessSeconds());

    ?>

以上示例会输出：

    int(-1)
    int(-1)
    int(90)
    int(1000)

### 参见

- » Read Preference reference

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