title: Convert 64 bit hexadecimal to float in PHP
body: <p>I'm trying to convert a 64 bit hexadecimal number to a float in PHP.</p>
  
  <pre><code>40F82C719999999A
  </code></pre>
  
  <p>If I run that in the IEEE-754 Floating-Point Conversion page at <a href="http://babbage.cs.qc.cuny.edu/IEEE-754.old/64bit.html" rel="nofollow">http://babbage.cs.qc.cuny.edu/IEEE-754.old/64bit.html</a> it converts to:</p>
  
  <pre><code>99015.100000000000
  </code></pre>
  
  <p>Which is the number I'm looking for. But I can't get to this number in PHP. I've tried using various combinations of pack() and unpack() but I'm not anywhere close. :(</p>