3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php spl_autoload_register(function($class) { if ('A' == $class) eval(' class a { const a = b::c; const b = b::d; }'); else eval('class b { const c = a::b; const d = 1; }'); }); var_dump(A::a, A::b, B::c, B::d);
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
int(1) int(1) int(1) int(1)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/94QSG on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/94QSG on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/94QSG on line 3
Process exited with code 255.