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run code in 200+ php & hhvm versions
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<?php namespace PhP\ExAmPlEs { class TestClasS {} } namespace { var_dump(class_exists('datetime'), class_exists('php\examples\testclass')); }
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
bool(true) bool(true)