Php/docs/mongodb-driver-readpreference.getmodestring

• PHP Manual
• MongoDB\Driver\ReadPreference
• Returns the ReadPreference's "mode" option as a string

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

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

范例

Example #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());?>

以上例程会输出：

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

参见

• MongoDB\Driver\ReadPreference::getMode() - Returns the ReadPreference's "mode" option
• » Read Preference reference