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<?php class Foo { protected $_foo = 'foo'; public function isMatch() { return $this->_foo == self::$_foo; } } class Bar extends Foo { protected $_foo = 'bar'; } $a = new Bar(); var_dump($a->isMatch());
based on TXuK7
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Access to undeclared static property: Foo::$_foo in /in/D0ZBT:7 Stack trace: #0 /in/D0ZBT(16): Foo->isMatch() #1 {main} thrown in /in/D0ZBT on line 7
Process exited with code 255.
Output for 5.3.17 - 5.6.28
Fatal error: Access to undeclared static property: Foo::$_foo in /in/D0ZBT on line 7
Process exited with code 255.