3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class A { public $a = "$a"; }
based on mXi9M
Output for 7.0.0 - 7.0.1
Fatal error: Constant expression contains invalid operations in /in/eegY7 on line 5
Process exited with code 255.
Output for 5.3.21 - 5.6.16
Parse error: syntax error, unexpected '"' in /in/eegY7 on line 5
Process exited with code 255.