<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Returns the ReadPreference's "tagSets" option</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mongodb-driver-readpreference.getmode.html">MongoDB\Driver\ReadPreference::getMode</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.mongodb-driver-readconcern.html">MongoDB\Driver\ReadConcern</a></div> <div class="up"><a href="class.mongodb-driver-readpreference.html">MongoDB\Driver\ReadPreference</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="mongodb-driver-readpreference.gettagsets" class="refentry"> <div class="refnamediv"> <h1 class="refname">MongoDB\Driver\ReadPreference::getTagSets</h1> <p class="verinfo">(mongodb >=1.0.0)</p><p class="refpurpose"><span class="refname">MongoDB\Driver\ReadPreference::getTagSets</span> — <span class="dc-title">Returns the ReadPreference's "tagSets" option</span></p> </div> <div class="refsect1 description" id="refsect1-mongodb-driver-readpreference.gettagsets-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="modifier">final</span> <span class="modifier">public</span> <span class="type">array</span> <span class="methodname"><strong>MongoDB\Driver\ReadPreference::getTagSets</strong></span> ( <span class="methodparam">void</span> )</div> </div> <div class="refsect1 parameters" id="refsect1-mongodb-driver-readpreference.gettagsets-parameters"> <h3 class="title">Parameters</h3> <p class="para">This function has no parameters.</p> </div> <div class="refsect1 returnvalues" id="refsect1-mongodb-driver-readpreference.gettagsets-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the ReadPreference's "tagSets" option. </p> </div> <div class="refsect1 errors" id="refsect1-mongodb-driver-readpreference.gettagsets-errors"> <h3 class="title">Errors/Exceptions</h3> <ul class="simplelist"> <li class="member">Throws <a href="class.mongodb-driver-exception-invalidargumentexception.html" class="classname">MongoDB\Driver\Exception\InvalidArgumentException</a> on argument parsing errors.</li> </ul> </div> <div class="refsect1 examples" id="refsect1-mongodb-driver-readpreference.gettagsets-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-1716"> <p><strong>Example #1 <span class="function"><strong>MongoDB\Driver\ReadPreference::getTagSets()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /><br />$mode </span><span style="color: #007700">= </span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">Driver</span><span style="color: #007700">\</span><span style="color: #0000BB">ReadPreference</span><span style="color: #007700">::</span><span style="color: #0000BB">RP_SECONDARY_PREFERRED</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">/* Null and an empty array both denote no tag set preference. */<br /></span><span style="color: #0000BB">$rp </span><span style="color: #007700">= new </span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">Driver</span><span style="color: #007700">\</span><span style="color: #0000BB">ReadPreference</span><span style="color: #007700">(</span><span style="color: #0000BB">$mode</span><span style="color: #007700">, </span><span style="color: #0000BB">null</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$rp</span><span style="color: #007700">-></span><span style="color: #0000BB">getTagSets</span><span style="color: #007700">());<br /><br /></span><span style="color: #0000BB">$rp </span><span style="color: #007700">= new </span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">Driver</span><span style="color: #007700">\</span><span style="color: #0000BB">ReadPreference</span><span style="color: #007700">(</span><span style="color: #0000BB">$mode</span><span style="color: #007700">, []);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$rp</span><span style="color: #007700">-></span><span style="color: #0000BB">getTagSets</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">/* Prefer a node in New York, but fall back to any available node. */<br /></span><span style="color: #0000BB">$rp </span><span style="color: #007700">= new </span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">Driver</span><span style="color: #007700">\</span><span style="color: #0000BB">ReadPreference</span><span style="color: #007700">(</span><span style="color: #0000BB">$mode</span><span style="color: #007700">, [[</span><span style="color: #DD0000">'dc' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'ny'</span><span style="color: #007700">]]);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$rp</span><span style="color: #007700">-></span><span style="color: #0000BB">getTagSets</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">/* Prefer a node in the New York, followed by a node in San Francisco that is<br /> labeled for reporting usage, and finally fall back to any available node. */<br /></span><span style="color: #0000BB">$rp </span><span style="color: #007700">= new </span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">Driver</span><span style="color: #007700">\</span><span style="color: #0000BB">ReadPreference</span><span style="color: #007700">(</span><span style="color: #0000BB">$mode</span><span style="color: #007700">, [<br /> [</span><span style="color: #DD0000">'dc' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'ny'</span><span style="color: #007700">],<br /> [</span><span style="color: #DD0000">'dc' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'sf'</span><span style="color: #007700">, </span><span style="color: #DD0000">'use' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'reporting'</span><span style="color: #007700">],<br /> [],<br />]);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$rp</span><span style="color: #007700">-></span><span style="color: #0000BB">getTagSets</span><span style="color: #007700">());<br /><br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> array(0) { } array(0) { } array(2) { [0]=> array(1) { ["dc"]=> string(2) "ny" } [1]=> array(0) { } } array(3) { [0]=> array(1) { ["dc"]=> string(2) "ny" } [1]=> array(2) { ["dc"]=> string(2) "sf" ["use"]=> string(9) "reporting" } [2]=> array(0) { } } </pre></div> </div> </div> </div> <div class="refsect1 seealso" id="refsect1-mongodb-driver-readpreference.gettagsets-seealso"> <h3 class="title">See Also</h3> <ul class="simplelist"> <li class="member"><a href="https://docs.mongodb.com/manual/core/read-preference/" class="link external">» Read Preference reference</a></li> </ul> </div> </div><hr /><div class="manualnavbar" 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