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<title>Perform case folding on a code point</title>
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<h1 class="refname">IntlChar::foldCase</h1>
<p class="verinfo">(PHP 7)</p><p class="refpurpose"><span class="refname">IntlChar::foldCase</span> — <span class="dc-title">Perform case folding on a code point</span></p>
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<div class="refsect1 description" id="refsect1-intlchar.foldcase-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="modifier">static</span> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>IntlChar::foldCase</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">$codepoint</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$options</code><span class="initializer"> = <strong><code>IntlChar::FOLD_CASE_DEFAULT</code></strong></span></span>
] )</div>
<p class="para rdfs-comment">
The given character is mapped to its case folding equivalent; if the character has no case folding equivalent,
the character itself is returned.
</p>
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<div class="refsect1 parameters" id="refsect1-intlchar.foldcase-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">codepoint</code></dt>
<dd>
<p class="para">The <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span> codepoint value (e.g. <em>0x2603</em> for <em class="emphasis">U+2603 SNOWMAN</em>), or the character encoded as a UTF-8 <span class="type"><a href="language.types.string.html" class="type string">string</a></span> (e.g. <em>"\u{2603}"</em>)</p>
</dd>
<dt>
<code class="parameter">options</code></dt>
<dd>
<p class="para">
Either <strong><code>IntlChar::FOLD_CASE_DEFAULT</code></strong> (default)
or <strong><code>IntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I</code></strong>.
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-intlchar.foldcase-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the <em class="emphasis">Simple_Case_Folding</em> of the code point, if any; otherwise the code point itself.
</p>
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