3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php abstract class A{ abstract function aa($f, $a = null); } class B{ function aa($f) { } }
based on BKb1m
Output for 5.0.0 - 7.2.0
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CLASS in /in/3Q8C0 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_CLASS in /in/3Q8C0 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/3Q8C0 on line 3
Process exited with code 255.