3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { private $foo; function __construct() { $this->foo = $foo } }
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.21, 7.0.0 - 7.0.6
Parse error: syntax error, unexpected '}' in /in/uAvKm on line 1
Process exited with code 255.
preferences:
157.96 ms | 1400 KiB | 71 Q