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    MongoDB\Driver\ReadPreference::getModeString

    (mongodb >=1.7.0)

    MongoDB\Driver\ReadPreference::getModeString — Returns the ReadPreference's "mode" option as a string

    说明

    final public MongoDB\Driver\ReadPreference::getModeString(): string

    参数

    此函数没有参数。

    返回值

    Returns the ReadPreference's "mode" option as a string.

    错误／异常

    示例

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

    <?php

    $rp     = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::PRIMARY);
    var_dump($rp->getModeString());

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::PRIMARY_PREFERRED);
    var_dump($rp->getModeString());

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

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::SECONDARY_PREFERRED);
    var_dump($rp->getModeString());

    $rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::NEAREST);
    var_dump($rp->getModeString());

    ?>

    以上示例会输出：

     
string(7) "primary"
string(16) "primaryPreferred"
string(9) "secondary"
string(18) "secondaryPreferred"
string(7) "nearest"

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