略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: MongoCursor::getReadPreference

2024-11-14

MongoCursor::getReadPreference

(PECL mongo >=1.3.3)

MongoCursor::getReadPreferenceGet the read preference for this query

说明

public MongoCursor::getReadPreference ( void ) : 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.

范例

Example #1 MongoCursor::getReadPreference() return value example

<?php

$m 
= new MongoClient();
$cursor $m->test->users->find();
$cursor->setReadPreference(MongoClient::RP_SECONDARY, array(
    array(
'dc' => 'east''use' => 'reporting'),
    array(
'dc' => 'west'),
    array(),
));
var_dump($cursor->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) {
    }
  }
}

参见

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/mongocursor.getreadpreference.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3