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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 331062 $ -->
<refentry xml:id="mongocollection.getreadpreference" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>MongoCollection::getReadPreference</refname>
<refpurpose>Get the read preference for this collection</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<modifier>public</modifier> <type>array</type><methodname>MongoCollection::getReadPreference</methodname>
<void />
</methodsynopsis>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
&no.function.parameters;
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
&mongo.getreadpreference.returnvalues;
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>1.3.3</entry>
<entry>
The return value has changed to be consistent with
<methodname>MongoCollection::setReadPreference</methodname>. The
<literal>type</literal> value was changed from a number to a string,
<literal>type_string</literal> was removed, and
<literal>tagsets</literal> now expresses tags as key/value pairs instead
of colon-delimited strings.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><methodname>MongoCollection::getReadPreference</methodname> return value example</title>
<programlisting role="php">
<![CDATA[
<?php
$m = new MongoClient();
$c = $m->test->users;
$c->setReadPreference(MongoClient::RP_SECONDARY, array(
array('dc' => 'east', 'use' => 'reporting'),
array('dc' => 'west'),
array(),
));
var_dump($c->getReadPreference());
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
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) {
}
}
}
]]>
</screen>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member>The <link linkend="mongo.readpreferences">read preferences</link> documentation.</member>
</simplelist>
</refsect1>
</refentry>
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