GoLang MongoDB::getReadPreference

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PHP MongoDB::getReadPreference

PHP original manual for MongoDB::getReadPreference [ show | php.net ]


(PECL mongo >=1.3.0)

MongoDB::getReadPreferenceGet the read preference for this database


public array MongoDB::getReadPreference ( void )


This function has no parameters.

Return Values

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.


Version Description
1.3.3 The return value has changed to be consistent with MongoDB::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.


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


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

The above example will output:

array(2) {
  string(9) "secondary"
  array(3) {
    array(2) {
      string(4) "east"
      string(9) "reporting"
    array(1) {
      string(7) "west"
    array(0) {

See Also