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run code in 200+ php & hhvm versions
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<?php // Everything you enter here will be executed by our servers. Try it! $cParentID = 0; var_dump($cParentID != null); var_dump($cParentID != 0); var_dump($cParentID);
Output for 4.3.0 - 7.2.0
bool(false) bool(false) int(0)