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<title>Sets the default domain</title>
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<h1 class="refname">textdomain</h1>
<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">textdomain</span> — <span class="dc-title">Sets the default domain</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.textdomain-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>textdomain</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$text_domain</code><span class="initializer"> = <strong><code>NULL</code></strong></span></span>
)</div>
<p class="para rdfs-comment">
This function sets the domain to search within when calls are
made to <span class="function"><a href="function.gettext.html" class="function">gettext()</a></span>, usually the named after an
application.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.textdomain-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">text_domain</code></dt>
<dd>
<p class="para">
The new message domain, or <strong><code>NULL</code></strong> to get the current setting without
changing it
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.textdomain-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
If successful, this function returns the current message
domain, after possibly changing it.
</p>
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