To take
a common example that will be familiar to PHP developers, before using input from an
online form, you need to make sure it doesn’t contain anything that could be used to sab-otage your database or relay spam. The procedural approach looks at the specific project,
and writes tailor-made code, usually a series of conditional statements designed to check
each input field in turn

...

OOP looks at programming in a more generic way. Instead of asking “How do I validate this
form?” the object-oriented approach is to ask “How do I validate any form?” It does so by
identifying common tasks and creating generic functions (or methods, as they’re called in
OOP) to handle them.