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<title>Decodes a hexadecimally encoded binary string</title>
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<h1 class="refname">sodium_hex2bin</h1>
<p class="verinfo">(PHP 7 >= 7.2.0)</p><p class="refpurpose"><span class="refname">sodium_hex2bin</span> — <span class="dc-title">Decodes a hexadecimally encoded binary string</span></p>
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<div class="refsect1 description" id="refsect1-function.sodium-hex2bin-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>sodium_hex2bin</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$hex</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$ignore</code></span>
] )</div>
<p class="para rdfs-comment">
Decodes a hexadecimally encoded binary string.
</p>
<p class="para">
Like <span class="function"><a href="function.sodium-bin2hex.html" class="function">sodium_bin2hex()</a></span>, <span class="function"><strong>sodium_hex2bin()</strong></span>
is resistant to side-channel attacks while <span class="function"><a href="function.hex2bin.html" class="function">hex2bin()</a></span> is not.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.sodium-hex2bin-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">hex</code></dt>
<dd>
<p class="para">
Hexadecimal representation of data.
</p>
</dd>
<dt>
<code class="parameter">ignore</code></dt>
<dd>
<p class="para">
Optional string argument for characters to ignore.
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.sodium-hex2bin-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the binary representation of the given <code class="parameter">hex</code> data.
</p>
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