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run code in 200+ php & hhvm versions
Bugs & Features
<?php interface a { } class b { } $b = new b; var_dump(is_subclass_of($b, 'a'));
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.1
bool(false)