3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { public $a = 'azerty'; function test() { $this->this = &$this; $this->a = $a; // $this->this = new a(0); } } $a = new a(10); $a->test(); var_dump($a);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Creation of dynamic property a::$this is deprecated in /in/bs8qH on line 8 Warning: Undefined variable $a in /in/bs8qH on line 9 object(a)#1 (2) { ["a"]=> NULL ["this"]=> *RECURSION* }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Warning: Undefined variable $a in /in/bs8qH on line 9 object(a)#1 (2) { ["a"]=> NULL ["this"]=> *RECURSION* }
Output for 5.2.14 - 5.2.17, 5.3.3 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: a in /in/bs8qH on line 9 object(a)#1 (2) { ["a"]=> NULL ["this"]=> *RECURSION* }
Output for 7.3.32 - 7.3.33
object(a)#1 (2) { ["a"]=> NULL ["this"]=> *RECURSION* }
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.13, 5.3.0 - 5.3.2
Notice: Undefined variable: a in /in/bs8qH on line 9 object(a)#1 (2) { ["a"]=> NULL ["this"]=> object(a)#1 (2) { ["a"]=> NULL ["this"]=> *RECURSION* } }
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: a in /in/bs8qH on line 9 object(a)#1 (2) { ["a"]=> NULL ["this"]=> object(a)#1 (2) { ["a"]=> NULL ["this"]=> *RECURSION* } }
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/bs8qH on line 4
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/bs8qH 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/bs8qH on line 4
Process exited with code 255.

preferences:
256.15 ms | 401 KiB | 356 Q