title: Convert Hex Code into readable string in PHP
body: <p>Hi StackOverflow Community,</p>
  
  <p>Here is my question, how to convert php that has hex code into readable string ?
  On what I mean is all inside this 2 php code..</p>
  
  <pre><code>&lt;?php
  
  echo "\x74\150\x69\163\x20\151\x73\40\x74\145\x73\164\x69\156\x67\40\x6f\156\x6c\171";
  
  echo test['\x74\171\x70\145'];
  
  echo range("\x61","\x7a");
  
  ?&gt;
  </code></pre>
  
  <p>this is un-readable code, I need some php function that can convert those unreadable code into readable code..so it will become like this after convert..</p>
  
  <pre><code>&lt;?php
  
  echo "this is testing only";
  
  echo test['type'];
  
  echo range("a","z");
  
  ?&gt;
  </code></pre>
  
  <p>I know i can just echo that hex to change it to readable string, but I have huge php file and lot's of php file that same like this, so I need php function that can automatically convert them all into readable code.</p>
  
  <p>Thank..</p>