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<title>Return the traits used by the given class</title>
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</div><hr /><div id="function.class-uses" class="refentry">
<div class="refnamediv">
<h1 class="refname">class_uses</h1>
<p class="verinfo">(PHP 5 >= 5.4.0)</p><p class="refpurpose"><span class="refname">class_uses</span> — <span class="dc-title">
Return the traits used by the given class
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.class-uses-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">array</span> <span class="methodname"><strong>class_uses</strong></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$class</code></span>
[, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$autoload</code><span class="initializer"> = true</span></span>
] )</div>
<p class="para rdfs-comment">
This function returns an array with the names of the traits that the
given <em><code class="parameter">class</code></em> uses. This does however not include
any traits used by a parent class.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.class-uses-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">class</code></em></span>
<dd>
<p class="para">
An object (class instance) or a string (class name).
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">autoload</code></em></span>
<dd>
<p class="para">
Whether to allow this function to load the class automatically through
the <span class="function"><a href="function.autoload.html" class="function">__autoload()</a></span> magic method.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.class-uses-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
An array on success, or <strong><code>FALSE</code></strong> on error.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.class-uses-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3914">
<p><strong>Example #1 <span class="function"><strong>class_uses()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />trait foo </span><span style="color: #007700">{ }<br />class </span><span style="color: #0000BB">bar </span><span style="color: #007700">{<br /> use </span><span style="color: #0000BB">foo</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">class_uses</span><span style="color: #007700">(new </span><span style="color: #0000BB">bar</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">class_uses</span><span style="color: #007700">(</span><span style="color: #DD0000">'bar'</span><span style="color: #007700">));<br /><br />function </span><span style="color: #0000BB">__autoload</span><span style="color: #007700">(</span><span style="color: #0000BB">$class_name</span><span style="color: #007700">) {<br /> require_once </span><span style="color: #0000BB">$class_name </span><span style="color: #007700">. </span><span style="color: #DD0000">'.php'</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// use __autoload to load the 'not_loaded' class<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">class_uses</span><span style="color: #007700">(</span><span style="color: #DD0000">'not_loaded'</span><span style="color: #007700">, </span><span style="color: #0000BB">true</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
something similar to:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Array
(
[foo] => foo
)
Array
(
[foo] => foo
)
Array
(
[trait_of_not_loaded] => trait_of_not_loaded
)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.class-uses-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.class-parents.html" class="function" rel="rdfs-seeAlso">class_parents()</a> - Return the parent classes of the given class</span></li>
<li class="member"> <span class="function"><a href="function.get-declared-traits.html" class="function" rel="rdfs-seeAlso">get_declared_traits()</a> - Returns an array of all declared traits</span></li>
</ul>
</p>
</div>
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