, which
is hard to deal with (i.e. a copy-paste may damage it), so you may use
<code class="docutils literal"><span class="pre">bin2hex()</span></code>, <code class="docutils literal"><span class="pre">hex2bin()</span></code> or Base64-encoding to work with the key in
a more friendly manner. For example:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Get a hex-encoded representation of the key:</span>
<span class="nv">$key</span> <span class="o">=</span> <span cla