Migration PHP5 to PHP7
How to migrate PHP5 to PHP7?
Method1: Bruteforce method
Run your application in PHP7 environment and find out list of unsupported apis and fix the error. Wherever possible introduce PHP7 mechanism.
Method2: Use migration tool
php7mar is a command-line tool that generates reports on PHP 5.x codebase based on PHP 7 compatibility. The reports contain line numbers, issues noted, and suggested fixes along with documentation links.
Note: The tool does not fix code. It only gives you reports about all the PHP files in your codebase. Happy fixing!