3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php new class() { private $a = 1; public function __construct() { ${$_='this'} = 2; // ${'this'.''} = 2; var_dump($this, $this->a, $this->a()); } function a(){} };
based on aB0EX
Output for 7.1.0 - 7.2.0
Fatal error: Uncaught Error: Cannot re-assign $this in /in/kKqWp:7 Stack trace: #0 /in/kKqWp(3): class@anonymous->__construct() #1 {main} thrown in /in/kKqWp on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.20
int(2) int(1) NULL
Output for 5.4.11 - 5.6.28
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/kKqWp on line 3
Process exited with code 255.
Output for 5.3.21 - 5.3.29
Parse error: syntax error, unexpected T_CLASS in /in/kKqWp on line 3
Process exited with code 255.