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run code in 200+ php & hhvm versions
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<?php abstract class T { final private function __construct(){ } public static function getInstance() { if (!isset(static::$instanses)) { static::$instanses = new $this; } return static::$instanses; } } class A extends T { } $t = A::getInstance(); var_dump($t); ?>
based on ur5gs
Output for 7.1.0 - 7.2.0
Fatal error: Uncaught Error: Using $this when not in object context in /in/kAGdT:13 Stack trace: #0 /in/kAGdT(24): T::getInstance() #1 {main} thrown in /in/kAGdT on line 13
Process exited with code 255.
Output for 7.0.3 - 7.0.20
Notice: Undefined variable: this in /in/kAGdT on line 13 Fatal error: Uncaught Error: Class name must be a valid object or a string in /in/kAGdT:13 Stack trace: #0 /in/kAGdT(24): T::getInstance() #1 {main} thrown in /in/kAGdT on line 13
Process exited with code 255.
Output for 7.0.0 - 7.0.2
Fatal error: Uncaught Error: Access to undeclared static property: A::$instanses in /in/kAGdT:13 Stack trace: #0 /in/kAGdT(24): T::getInstance() #1 {main} thrown in /in/kAGdT on line 13
Process exited with code 255.
Output for 5.3.17 - 5.6.28
Notice: Undefined variable: this in /in/kAGdT on line 13 Fatal error: Class name must be a valid object or a string in /in/kAGdT on line 13
Process exited with code 255.