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<title>Undefine a constant</title>
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<div class="refnamediv">
<h1 class="refname">uopz_undefine</h1>
<p class="verinfo">(PECL uopz 1, PECL uopz 2, PECL uopz 5)</p><p class="refpurpose"><span class="refname">uopz_undefine</span> — <span class="dc-title">Undefine a constant</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.uopz-undefine-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>uopz_undefine</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$constant</code></span>
)</div>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>uopz_undefine</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$class</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$constant</code></span>
)</div>
<p class="para rdfs-comment">
Removes the constant at runtime
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.uopz-undefine-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">class</code></dt>
<dd>
<p class="para">
The name of the class containing <code class="parameter">constant</code>
</p>
</dd>
<dt>
<code class="parameter">constant</code></dt>
<dd>
<p class="para">
The name of an existing constant
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.uopz-undefine-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.uopz-undefine-examples">
<h3 class="title">Examples</h3>
<div class="example" id="uopz-get-static.example.basic">
<p><strong>Example #1 <span class="function"><strong>uopz_undefine()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />define</span><span style="color: #007700">(</span><span style="color: #DD0000">"MY"</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">uopz_undefine</span><span style="color: #007700">(</span><span style="color: #DD0000">"MY"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">defined</span><span style="color: #007700">(</span><span style="color: #DD0000">"MY"</span><span style="color: #007700">));<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>
bool(false)
</pre></div>
</div>
</div>
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