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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = null; $isa = is_bool($a) || is_array($a); var_dump($isa, !$isa && trim((string)$a));
based on dTN7e
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0beta1
bool(false) bool(false)