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<?php class A { public static function foo() { return 'A'; } } class B extends A { public static function withSelf() { return self::foo(); } public static function withParent() { return parent::foo(); } public static function withStatic() { return static::foo(); } public static function withClass() { return (parent::class)::foo(); } } echo 'Self: '.B::withSelf(), PHP_EOL, 'Parent: '.B::withParent(), PHP_EOL, 'Static: '.B::withStatic(), PHP_EOL, 'Class: '.B::withClass();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Self: A Parent: A Static: A Class: A
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Parse error: syntax error, unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM) in /in/AS32J on line 20
Process exited with code 255.

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