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run code in 150+ php & hhvm versions
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<?php define('DUMMY',"dummy"); ///// function foo($id=DUMMY){ var_dump(is_string($id)); if($id == DUMMY){ echo "foo"; } else { echo "bar"; } } ///// foo(0);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) foo