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<title>Test if the DOM implementation implements a specific feature</title>
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<h1 class="refname">DOMImplementation::hasFeature</h1>
<p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">DOMImplementation::hasFeature</span> — <span class="dc-title">
Test if the DOM implementation implements a specific feature
</span></p>
</div>
<div class="refsect1 description" id="refsect1-domimplementation.hasfeature-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type">bool</span> <span class="methodname"><strong>DOMImplementation::hasFeature</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$feature</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$version</code></span>
)</div>
<p class="para rdfs-comment">
Test if the DOM implementation implements a specific
<em><code class="parameter">feature</code></em>.
</p>
<p class="para">
You can find a list of all features in the <a href="http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/introduction.html#ID-Conformance" class="link external">» Conformance</a> section of the DOM
specification.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-domimplementation.hasfeature-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">feature</code></em></span>
<dd>
<p class="para">
The feature to test.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">version</code></em></span>
<dd>
<p class="para">
The version number of the <em><code class="parameter">feature</code></em> to test. In
level 2, this can be either <em>2.0</em> or
<em>1.0</em>.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-domimplementation.hasfeature-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 errors" id="refsect1-domimplementation.hasfeature-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">This method <em class="emphasis">may</em> be called statically, but will issue an <strong><code>E_STRICT</code></strong> error.</p>
</div>
<div class="refsect1 examples" id="refsect1-domimplementation.hasfeature-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-5425">
<p><strong>Example #1 Testing your DOM Implementation</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />$features </span><span style="color: #007700">= array(<br /> </span><span style="color: #DD0000">'Core' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Core module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'XML' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'XML module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'HTML' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'HTML module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'Views' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Views module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'Stylesheets' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Style Sheets module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'CSS' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'CSS module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'CSS2' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'CSS2 module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'Events' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Events module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'UIEvents' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'User interface Events module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'MouseEvents' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Mouse Events module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'MutationEvents' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Mutation Events module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'HTMLEvents' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'HTML Events module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'Range' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Range module'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'Traversal' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Traversal module'<br /></span><span style="color: #007700">);<br /> <br />foreach (</span><span style="color: #0000BB">$features </span><span style="color: #007700">as </span><span style="color: #0000BB">$key </span><span style="color: #007700">=> </span><span style="color: #0000BB">$name</span><span style="color: #007700">) {<br /> if (</span><span style="color: #0000BB">DOMImplementation</span><span style="color: #007700">::</span><span style="color: #0000BB">hasFeature</span><span style="color: #007700">(</span><span style="color: #0000BB">$key</span><span style="color: #007700">, </span><span style="color: #DD0000">'2.0'</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"Has feature </span><span style="color: #0000BB">$name</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> } else {<br /> echo </span><span style="color: #DD0000">"Missing feature </span><span style="color: #0000BB">$name</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> }<br />}<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-domimplementation.hasfeature-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="domnode.issupported.html" class="methodname" rel="rdfs-seeAlso">DOMNode::isSupported()</a> - Checks if feature is supported for specified version</span></li>
</ul>
</p>
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