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<title>Checks if the given hash matches the given options</title>
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<h1 class="refname">password_needs_rehash</h1>
<p class="verinfo">(PHP 5 >= 5.5.0)</p><p class="refpurpose"><span class="refname">password_needs_rehash</span> — <span class="dc-title">Checks if the given hash matches the given options</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.password-needs-rehash-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">boolean</span> <span class="methodname"><strong>password_needs_rehash</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$hash</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$algo</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$options</code></span>
] )</div>
<p class="para rdfs-comment">
This function checks to see if the supplied hash implements the algorithm
and options provided. If not, it is assumed that the hash needs to be
rehashed.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.password-needs-rehash-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<span class="term"><em><code class="parameter">hash</code></em></span>
<dd>
<p class="para">
A hash created by <span class="function"><a href="function.password-hash.html" class="function">password_hash()</a></span>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">algo</code></em></span>
<dd>
<p class="para">
A <a href="password.constants.html" class="link">password algorithm constant</a> denoting the algorithm to use when hashing the password.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">options</code></em></span>
<dd>
<p class="para">
An associative array containing options. See the <a href="password.constants.html" class="link">password algorithm constants</a> for documentation on the supported options for each algorithm.
</p>
</dd>
</dt>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.password-needs-rehash-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if the hash should be rehashed to match the given
<em><code class="parameter">algo</code></em> and <em><code class="parameter">options</code></em>, or <strong><code>FALSE</code></strong>
otherwise.
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