3v4l.org

run code in 300+ PHP versions simultaneously
<?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 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: 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 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
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 7.3.32 - 7.3.33
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 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
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 5.1.0 - 5.1.6, 5.2.0 - 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 - 4.3.11, 4.4.0 - 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.
preferences:
198.9 ms | 401 KiB | 313 Q