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<title>Predefined Classes</title>
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</div><hr /><div id="reserved.classes" class="sect1">
<h2 class="title">Predefined Classes</h2>
<p class="para">
This section lists standard predefined classes. Miscellaneous extensions
define other classes which are described in their reference.
</p>
<div class="sect2" id="reserved.classes.standard">
<h3 class="title">Standard Defined Classes</h3>
<p class="simpara">
These classes are defined in the standard set of functions included
in the PHP build.
</p>
<dl>
<dt>
<span class="term"><a href="class.directory.html" class="classname">Directory</a></span>
<dd>
<span class="simpara">
Created by <span class="function"><a href="function.dir.html" class="function">dir()</a></span>.
</span>
</dd>
</dt>
<dt>
<span class="term"><strong class="classname">stdClass</strong></span>
<dd>
<span class="simpara">
Created by <a href="language.types.object.html#language.types.object.casting" class="link">typecasting
to object</a>.
</span>
</dd>
</dt>
<dt>
<span class="term"><strong class="classname">__PHP_Incomplete_Class</strong></span>
<dd>
<span class="simpara">
Possibly created by <span class="function"><a href="function.unserialize.html" class="function">unserialize()</a></span>.
</span>
</dd>
</dt>
</dl>
</div>
<div class="sect2" id="reserved.classes.php5">
<h3 class="title">Predefined classes as of PHP 5</h3>
<p class="simpara">
These additional predefined classes were introduced in
PHP 5.0.0.
</p>
<dl>
<dt>
<span class="term"><a href="class.exception.html" class="classname">Exception</a></span>
<dd>
<span class="simpara">
</span>
</dd>
</dt>
<dt>
<span class="term"><a href="class.errorexception.html" class="classname">ErrorException</a></span>
<dd>
<span class="simpara">
Available since PHP 5.1.0.
</span>
</dd>
</dt>
<dt>
<span class="term"><a href="class.php-user-filter.html" class="classname">php_user_filter</a></span>
<dd>
<span class="simpara">
</span>
</dd>
</dt>
</dl>
</div>
<div class="sect2" id="reserved.classes.closure">
<h3 class="title">Closure</h3>
<p class="simpara">
The predefined final class <a href="class.closure.html" class="classname">Closure</a> was introduced
in PHP 5.3.0. It is used for representing <a href="functions.anonymous.html" class="link">anonymous functions</a>.
</p>
<p class="simpara">
For more information, see its <a href="class.closure.html" class="link">class
page</a>.
</p>
</div>
<div class="sect2" id="reserved.classes.generator">
<h3 class="title">Generator</h3>
<p class="simpara">
The predefined final class <a href="class.generator.html" class="classname">Generator</a> was introduced
in PHP 5.5.0. It is used for representing <a href="language.generators.html" class="link">generators</a>.
</p>
<p class="simpara">
For more information, see its <a href="class.generator.html" class="link">class
page</a>.
</p>
</div>
<div class="sect2" id="reserved.classes.special">
<h3 class="title">Special classes</h3>
<p class="simpara">
Following identifiers may not be used as a class name as they have
special purpose.
</p>
<dl>
<dt>
<span class="term"><strong class="classname">self</strong></span>
<dd>
<span class="simpara">
<a href="language.oop5.paamayim-nekudotayim.html" class="link">Current
class</a>.
</span>
</dd>
</dt>
<dt>
<span class="term"><strong class="classname">static</strong></span>
<dd>
<span class="simpara">
<a href="language.oop5.late-static-bindings.html" class="link">Current class in
runtime</a>.
</span>
</dd>
</dt>
<dt>
<span class="term"><strong class="classname">parent</strong></span>
<dd>
<span class="simpara">
<a href="language.oop5.paamayim-nekudotayim.html" class="link">Parent
class</a>.
</span>
</dd>
</dt>
</dl>
</div>
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