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<title>Produce diff of two XML documents</title>
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<h1 class="refname">XMLDiff\Base::diff</h1>
<p class="verinfo">(PECL xmldiff >= 0.8.0)</p><p class="refpurpose"><span class="refname">XMLDiff\Base::diff</span> — <span class="dc-title">Produce diff of two XML documents</span></p>
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<div class="refsect1 description" id="refsect1-xmldiff-base.diff-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">abstract</span> <span class="modifier">public</span> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>XMLDiff\Base::diff</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">$from</code></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$to</code></span>
)</div>
<p class="para rdfs-comment">
Abstract diff method to be implemented by inheriting classes.
</p>
<p class="para">
The basic purpose of this method is to produce diff of the two documents. The param order matters and will produce different output.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-xmldiff-base.diff-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<span class="term"><em><code class="parameter">from</code></em></span>
<dd>
<p class="para">
Source XML document.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">to</code></em></span>
<dd>
<p class="para">
Target XML document.
</p>
</dd>
</dt>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-xmldiff-base.diff-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Implementation dependent.
</p>
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