3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = new class {}; class_alias(get_class($a), 'A'); class B extends A{} $b = new B; print serialize($b);
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Exception: Serialization of 'B' is not allowed in /in/a9XXi:7 Stack trace: #0 /in/a9XXi(7): serialize(Object(B)) #1 {main} thrown in /in/a9XXi on line 7
Process exited with code 255.
Output for 5.4.9 - 5.6.28
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/a9XXi on line 3
Process exited with code 255.
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected T_CLASS in /in/a9XXi on line 3
Process exited with code 255.