<?php
abstract class foo {
public function a(){
return FALSE;
}
public function b(){
var_dump($this->a());
}
}
class bar {
public function a(){
return TRUE;
}
}
$f = new bar();
$f->b();
Fatal error: Uncaught Error: Call to undefined method bar::b() in /in/s30pg:21
Stack trace:
#0 {main}
thrown in /in/s30pg on line 21
Process exited with code 255.