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run code in 200+ php & hhvm versions
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<?php $test = null; $bool = ($test !== null && $test <= 0)?true:false; var_dump($bool);
based on 6ovOt
Output for 5.6.0 - 5.6.30, hhvm-3.12.14 - 3.17.3, 7.0.0 - 7.3.0rc3
bool(false)