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<title>Determine terminal device name</title>
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<h1 class="refname">posix_ttyname</h1>
<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">posix_ttyname</span> — <span class="dc-title">Determine terminal device name</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.posix-ttyname-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>posix_ttyname</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">$fd</code></span>
)</div>
<p class="para rdfs-comment">
Returns a <span class="type"><a href="language.types.string.html" class="type string">string</a></span> for the absolute path to the current
terminal device that is open on the file descriptor
<code class="parameter">fd</code>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.posix-ttyname-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">fd</code></dt>
<dd>
<p class="para">
The file descriptor, which is expected to be either a file
<span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span> or an <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>. An <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>
will be assumed to be a file descriptor that can be passed directly to
the underlying system call.
</p>
<p class="para">
In almost all cases, you will want to provide a file <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.posix-ttyname-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
On success, returns a <span class="type"><a href="language.types.string.html" class="type string">string</a></span> of the absolute path of the
<code class="parameter">fd</code>. On failure, returns <strong><code>FALSE</code></strong>
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