3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A{ public function __construct(){ $b = new B(); $a = $this; $b->a = function() use($a){ $a->x(); }; $b->callA(); } public function x(){ var_dump('a'); } } class B { public $a; public function callA(){ $this->$a(); } } $a = new A();
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: a in /in/Zja8Q on line 18 Fatal error: Uncaught Error: Method name must be a string in /in/Zja8Q:18 Stack trace: #0 /in/Zja8Q(9): B->callA() #1 /in/Zja8Q(21): A->__construct() #2 {main} thrown in /in/Zja8Q on line 18
Process exited with code 255.
Output for 5.3.0 - 5.6.28, hhvm-3.12.0
Notice: Undefined variable: a in /in/Zja8Q on line 18 Fatal error: Method name must be a string in /in/Zja8Q on line 18
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/Zja8Q on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/Zja8Q on line 6
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/Zja8Q on line 3
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/Zja8Q on line 3
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/Zja8Q on line 3
Process exited with code 255.