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<title>Generates a PKCS5 v2 PBKDF2 string, defaults to SHA-1</title>
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<h1 class="refname">openssl_pbkdf2</h1>
<p class="verinfo">(PHP 5 >= 5.5.0)</p><p class="refpurpose"><span class="refname">openssl_pbkdf2</span> — <span class="dc-title">Generates a PKCS5 v2 PBKDF2 string, defaults to SHA-1</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.openssl-pbkdf2-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>openssl_pbkdf2</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$password</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$salt</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$key_length</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$iterations</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$digest_algorithm</code></span>
] )</div>
<p class="para rdfs-comment">
</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.openssl-pbkdf2-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<span class="term"><em><code class="parameter">password</code></em></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">salt</code></em></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">key_length</code></em></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">iterations</code></em></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">digest_algorithm</code></em></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.openssl-pbkdf2-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns string or <strong><code>FALSE</code></strong> on failure.
</p>
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