Php/docs/mongoclient.getreadpreference
MongoClient::getReadPreference
(PECL mongo >=1.3.0)
MongoClient::getReadPreference — 获取此连接的读取首选项
This extension that defines this method is deprecated. Instead, the MongoDB extension should be used. There is no equivalent for this method in the new extension.
说明
public MongoClient::getReadPreference ( ) : array
参数
此函数没有参数。
返回值
This function returns an array describing the read preference. The array contains the values type
for the string read preference mode (corresponding to the MongoClient constants), and tagsets
containing a list of all tag set criteria. If no tag sets were specified, tagsets
will not be present in the array.
更新日志
版本 | 说明 |
---|---|
1.3.3 | 返回的值修改为兼容
MongoClient::setReadPreference()。
|
范例
Example #1 MongoClient::getReadPreference() 返回值例子
<?php$m = new MongoClient();$m->setReadPreference(MongoClient::RP_SECONDARY, array( array('dc' => 'east', 'use' => 'reporting'), array('dc' => 'west'), array(),));var_dump($m->getReadPreference());?>
以上例程会输出:
array(2) { ["type"]=> string(9) "secondary" ["tagsets"]=> array(3) { [0]=> array(2) { ["dc"]=> string(4) "east" ["use"]=> string(9) "reporting" } [1]=> array(1) { ["dc"]=> string(7) "west" } [2]=> array(0) { } } }