3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Image {} class Headed extends Image { } class Dimension { function __construct(Image $image) { echo 'works'; } } $h = new Headed; $d = new Dimension($h); ?>
based on It6IM
Output for 5.0.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
works
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/Nn6HV on line 8
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_STRING, expecting ')' in /in/Nn6HV on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/Nn6HV on line 8
Process exited with code 255.