title: Converting byte-stream into numeric data-type
body: <p>Let's say I have a byte-stream in which I know the location of a 64-bit value (a 64-bit nonce). The byte-order is Little-Endian. As PHP's integer data-type is limited to 32-bit (at least on 32-bit operating systems) how would I convert the byte-sequence into a PHP numeric representation (float would be sufficient I think)?</p>
  
  <pre><code>$serverChallenge = substr($bytes, 24, 8);
  // $serverChallenge now contains the byte-sequence 
  // of which I know that it's a 64-bit value
  </code></pre>