Not if it's written PHP and went through the hand of multiple developers in its early days when standards were less well defined.
Coding in PHP has become a lot better over they years but if you have the misfortune of having to maintain legacy code it' s pretty much guaranteed to be a bad time.
No MVC, no templates, no PDO hell it's one step removed from the early days when everything was in 1 big file and nobody seems to be bothered by it or willing to budget time to rewrite it and eliminate the technical debt incurred every time you need to modify it.
Coding in PHP has become a lot better over they years but if you have the misfortune of having to maintain legacy code it' s pretty much guaranteed to be a bad time.
No MVC, no templates, no PDO hell it's one step removed from the early days when everything was in 1 big file and nobody seems to be bothered by it or willing to budget time to rewrite it and eliminate the technical debt incurred every time you need to modify it.