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<title>Compress data with the specified encoding</title>
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<h1 class="refname">zlib_encode</h1>
<p class="verinfo">(PHP 5 >= 5.4.0, PHP 7)</p><p class="refpurpose"><span class="refname">zlib_encode</span> — <span class="dc-title">Compress data with the specified encoding</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.zlib-encode-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>zlib_encode</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$encoding</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$level</code><span class="initializer"> = -1</span></span>
] )</div>
<p class="para rdfs-comment">
Compress data with the specified encoding.
</p>
<div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function is
currently not documented; only its argument list is available.
</p></div>
</div>
<div class="refsect1 parameters" id="refsect1-function.zlib-encode-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">data</code></dt>
<dd>
<p class="para">
The data to compress.
</p>
</dd>
<dt>
<code class="parameter">encoding</code></dt>
<dd>
<p class="para">
The compression algorithm. Either <strong><code>ZLIB_ENCODING_RAW</code></strong>,
<strong><code>ZLIB_ENCODING_DEFLATE</code></strong> or
<strong><code>ZLIB_ENCODING_GZIP</code></strong>.
</p>
</dd>
<dt>
<code class="parameter">level</code></dt>
<dd>
<p class="para">
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.zlib-encode-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.zlib-encode-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-917">
<p><strong>Example #1 <span class="function"><strong>zlib_encode()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">'hello world'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$enc </span><span style="color: #007700">= </span><span style="color: #0000BB">zlib_encode</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">ZLIB_ENCODING_DEFLATE</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">bin2hex</span><span style="color: #007700">(</span><span style="color: #0000BB">$enc</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
789ccb48cdc9c95728cf2fca4901001a0b045d
</pre></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-function.zlib-encode-seealso">
<h3 class="title">See Also</h3>
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.zlib-decode.html" class="function" rel="rdfs-seeAlso">zlib_decode()</a> - Uncompress any raw/gzip/zlib encoded data</span></li>
</ul>
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