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run code in 200+ php & hhvm versions
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<?php class A { public function f() { $x = async static function ($x) { var_dump($x); }; $x(1); } } (new A())->f();
based on f0rFN
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.1.6
Parse error: syntax error, unexpected 'static' (T_STATIC) in /in/AKdQi on line 5
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: syntax error, unexpected T_STATIC in /in/AKdQi:5 Stack trace: #0 {main}
Process exited with code 255.