PHP & Twig Code Clean-up

Hi Experts, smm panel script I have a live web application built on custom PHP and Twig. Over time, this script has been modified 2 or 3 times by different developers. Because of these multiple past modifications, the internal codebase has become extremely messy and unstable... (Budget: ₹1500 - ₹12500 INR, Jobs: Debugging, HTML, JavaScript, MySQL, PHP, Security, Software Development, Software Engineering, Technical Documentation, Web Development)