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<title>Validates the document based on its DTD</title>
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<h1 class="refname">DOMDocument::validate</h1>
<p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">DOMDocument::validate</span> — <span class="dc-title">
Validates the document based on its DTD
</span></p>
</div>
<div class="refsect1 description" id="refsect1-domdocument.validate-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>DOMDocument::validate</strong></span>
( <span class="methodparam">void</span>
)</div>
<p class="para rdfs-comment">
Validates the document based on its DTD.
</p>
<p class="para">
You can also use the <em>validateOnParse</em> property of
<a href="class.domdocument.html" class="classname">DOMDocument</a> to make a DTD validation.
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-domdocument.validate-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.
If the document have no DTD attached, this method will return <strong><code>FALSE</code></strong>.
</p>
</div>
<div class="refsect1 examples" id="refsect1-domdocument.validate-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-5418">
<p><strong>Example #1 Example of DTD validation</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$dom </span><span style="color: #007700">= new </span><span style="color: #0000BB">DOMDocument</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$dom</span><span style="color: #007700">-></span><span style="color: #0000BB">Load</span><span style="color: #007700">(</span><span style="color: #DD0000">'book.xml'</span><span style="color: #007700">);<br />if (</span><span style="color: #0000BB">$dom</span><span style="color: #007700">-></span><span style="color: #0000BB">validate</span><span style="color: #007700">()) {<br /> echo </span><span style="color: #DD0000">"This document is valid!\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>
You can also validate your XML file while loading it:
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$dom </span><span style="color: #007700">= new </span><span style="color: #0000BB">DOMDocument</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$dom</span><span style="color: #007700">-></span><span style="color: #0000BB">validateOnParse </span><span style="color: #007700">= </span><span style="color: #0000BB">true</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$dom</span><span style="color: #007700">-></span><span style="color: #0000BB">Load</span><span style="color: #007700">(</span><span style="color: #DD0000">'book.xml'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-domdocument.validate-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="domdocument.schemavalidate.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::schemaValidate()</a> - Validates a document based on a schema</span></li>
<li class="member"> <span class="methodname"><a href="domdocument.schemavalidatesource.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::schemaValidateSource()</a> - Validates a document based on a schema</span></li>
<li class="member"> <span class="methodname"><a href="domdocument.relaxngvalidate.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::relaxNGValidate()</a> - Performs relaxNG validation on the document</span></li>
<li class="member"> <span class="methodname"><a href="domdocument.relaxngvalidatesource.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::relaxNGValidateSource()</a> - Performs relaxNG validation on the document</span></li>
</ul>
</p>
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