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<title>Writes data to fd with optional truncation at length</title>
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<h1 class="refname">dio_write</h1>
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5)</p><p class="refpurpose"><span class="refname">dio_write</span> — <span class="dc-title">
Writes data to fd with optional truncation at length
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.dio-write-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>dio_write</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$fd</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$len</code><span class="initializer"> = 0</span></span>
] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>dio_write()</strong></span> writes up to <em><code class="parameter">len</code></em>
bytes from <em><code class="parameter">data</code></em> to file <em><code class="parameter">fd</code></em>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.dio-write-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">fd</code></em></span>
<dd>
<p class="para">
The file descriptor returned by <span class="function"><a href="function.dio-open.html" class="function">dio_open()</a></span>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">data</code></em></span>
<dd>
<p class="para">
The written data.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">len</code></em></span>
<dd>
<p class="para">
The length of data to write in bytes. If not specified, the
function writes all the data to the specified file.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.dio-write-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the number of bytes written to <em><code class="parameter">fd</code></em>.
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.dio-write-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.dio-read.html" class="function" rel="rdfs-seeAlso">dio_read()</a> - Reads bytes from a file descriptor</span></li>
</ul>
</p>
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