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run code in 150+ php & hhvm versions
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<?php $x = 12; switch (true) { case is_numeric($x): echo 'is numeric'; break; case is_string($x): echo 'is string'; break; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
is numeric