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run code in 150+ php & hhvm versions
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<?php class A { public static $a; public $b; public function ab() { return $this::$b; } public function __construct() { var_dump($this::ab(), $this::ab()); } } $a = new A; $a::ab();
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Access to undeclared static property: A::$b in /in/4onpT:7 Stack trace: #0 /in/4onpT(10): A->ab() #1 /in/4onpT(14): A->__construct() #2 {main} thrown in /in/4onpT on line 7
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Invalid static property access: A::b in /in/4onpT on line 7
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.6.28
Fatal error: Access to undeclared static property: A::$b in /in/4onpT on line 7
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /in/4onpT on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /in/4onpT on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/4onpT on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/4onpT on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/4onpT on line 4
Process exited with code 255.