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<h1 class="refname">MongoDB\Driver\Session::advanceOperationTime</h1>
<p class="verinfo">(mongodb >=1.4.0)</p><p class="refpurpose"><span class="refname">MongoDB\Driver\Session::advanceOperationTime</span> — <span class="dc-title">Advances the operation time for this session</span></p>
</div>
<div class="refsect1 description" id="refsect1-mongodb-driver-session.advanceoperationtime-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span> <span class="modifier">public</span> <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>MongoDB\Driver\Session::advanceOperationTime</strong></span>
( <span class="methodparam"><span class="type"><span class="type MongoDB\BSON\TimestampInterface">MongoDB\BSON\TimestampInterface</span></span> <code class="parameter">$operationTime</code></span>
)</div>
<p class="para rdfs-comment">
Advances the operation time for this session. If the operation time is less
than or equal to the session's current operation time, this function is a
no-op.
</p>
<p class="para">
By using this method in conjunction with
<span class="methodname"><a href="mongodb-driver-session.advanceclustertime.html" class="methodname">MongoDB\Driver\Session::advanceClusterTime()</a></span> to copy
the operation and cluster times from another session, you can ensure that
operations in this session are causally consistent with the last operation in
the other session.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-mongodb-driver-session.advanceoperationtime-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">operationTime</code></dt>
<dd>
<p class="para">
The operation time is a logical timestamp. Typically, this value will be
obtained by calling
<span class="methodname"><a href="mongodb-driver-session.getoperationtime.html" class="methodname">MongoDB\Driver\Session::getOperationTime()</a></span> on
another session object.
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-mongodb-driver-session.advanceoperationtime-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
No value is returned.
</p>
</div>
<div class="refsect1 errors" id="refsect1-mongodb-driver-session.advanceoperationtime-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 seealso" id="refsect1-mongodb-driver-session.advanceoperationtime-seealso">
<h3 class="title">See Also</h3>
<ul class="simplelist">
<li class="member"><span class="methodname"><a href="mongodb-driver-session.advanceclustertime.html" class="methodname" rel="rdfs-seeAlso">MongoDB\Driver\Session::advanceClusterTime()</a> - Advances the cluster time for this session</span></li>
<li class="member"><span class="methodname"><a href="mongodb-driver-session.getclustertime.html" class="methodname" rel="rdfs-seeAlso">MongoDB\Driver\Session::getClusterTime()</a> - Returns the cluster time for this session</span></li>
</ul>
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