PHP 5 was released 14 years ago in July, 2004. One of its new features was OOP. Classes were supported at that time. In fact, a comment from 14 years ago shows

PHP 5 was released 14 years ago in July, 2004. One of its new features was OOP. Classes were supported at that time. In fact, a comment from 14 years ago shows an example class [1]. [1]: http://php.net/manual/en/language.oop5.php#46290 http://php.net/manual/en/language.oop5.php#46290