Cannot make non abstract method i::foo() abstract in class j

Description

It is not possible to make a method abstract if there is a concrete method of the same name in the parents. Convertir a method to an abstract one is not allowed.

On the other hand, it is possible to have a child abstract class, with a concrete parent.

Example

<?php

class i {
     function foo() {}
}

class j extends i {
     abstract function foo();
}


?>

Solutions

• Make the whole class abstract.

• Remove the abstract from the method.

• Export the method to an interface.