:</span><span style="color: #0000BB">t</span><span style="color: #007700">(</span><span style="color: #DD0000">'yii'</span><span style="color: #007700">,</span><span style="color: #DD0000">'The&nbsp;stack&nbsp;is&nbsp;empty.'</span><span style="color: #007700">));<br />}</span>
</span>
</code></div>
</div>
<p>Pops up the item at the top of the stack.</p>


<div class="detailHeader" id="push-detail">
push()
<span class="detailHeaderTag">
method
</span>
</div>

<table class="summaryTable">
<tr><td colspan="3"