title: mcrypt_decrypt() error change key size
body: <blockquote>
    <p>mcrypt_decrypt(): Key of size 15 not supported by this algorithm. Only keys of sizes 16, 24 or 32 supported</p>
  </blockquote>
  
  <p>How Can I fix this issue? my key is set - can not change it.
  It has to be a local change, I think my local PHP version is too advanced for the project I loaded.
  How can I fix this?</p>