I got an old running project that was developed with HTML, CSS, PHP, MySQL, JS, AJAX (jQuery) but without MVC, ORM, etc. Just HTML/CSS/JS and PHP is seperated. I am currently working on this project and do some improvements of the sotware from time to time. Since the system is in use every day, I want to introduce CakePHP module by module and improve the quality step by step.
Having MVC, ORM, etc. would make maintaining more efficient but I don't have the time to rewrite everything at once. I don't think there won't be many problems except the login procedure (make sure that when you log in using the routine of CakePHP that the user is logged in while using modules of the old system) and linking of the files.
What do you think about it? Are there more obstacles?