title: Decode hex string to string like hex2bin method in PHP
body: <p>I need to concat binary with string in swift, to do this we should get same result as PHP 'hex2bin' method, I know its strange but we can do this in PHP(and I cant understand what the hell is going on when we are concating binary with string :) ) :</p>
  <pre><code>$hexbinary = hex2bin('c0e11c7d13b7bf84b83bb5c8a7873c1c')
  $concatResult = $hexbinary . '222'
  </code></pre>
  <p>I tried to decode hex to string in swift with all the available encodings, but no one has the same result:</p>
  <pre><code>let decodedHex = String(data: Data(hex: &quot;c0e11c7d13b7bf84b83bb5c8a7873c1c&quot;), encoding: .isoLatin1//Or other possible encodings)
  let concatResult = &quot;\(decodedHex)222&quot;
  </code></pre>