MongoClient
PHP-Handbuch

MongoClient::getReadPreference

Get the read preference for this connection

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.

Beschreibung

public array MongoClient::getReadPreference ( void )

Parameter-Liste

Diese Funktion hat keine Parameter.

Rückgabewerte

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.

Changelog

Version Beschreibung
1.3.3 The return value has changed to be consistent with MongoClient::setReadPreference. The type value was changed from a number to a string, type_string was removed, and tagsets now expresses tags as key/value pairs instead of colon-delimited strings.

Beispiele

Beispiel #1 MongoClient::getReadPreference return value example

<?php

$m = new MongoClient();
$m->setReadPreference(MongoClient::RP_SECONDARY, array(
    array('dc' => 'east', 'use' => 'reporting'),
    array('dc' => 'west'),
    array(),
));
var_dump($m->getReadPreference());
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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) {
    }
  }
}

Siehe auch