Looking for PHP Developer for Repair Warning and Fatal Error

Hi, I've a working Script and it works perfectly what I want. But, recently I've changed my VPS and in the new VPS PHP Version is 5.4.19 and that's why I might getting the Below Error: Warning: fread(): Length parameter must be greater than 0 Fatal error: Call to undefined function mcrypt_decrypt() But, I'm still running the same script into my another on VPS and which is running perfectly with PHP version 5.4.17 and it's working perfectly without any issues. I need to fix this things asap. Please, if you've skills then please Bid here and fix this things for me. I am waiting