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<?php $aLoopValue = array('', ' ' , false, true, array(), null, '0', 0, 0.0, '\0'); foreach ($aLoopValue as $val) { echo 'aa'.var_dump(isset($val)).' / '.var_dump(empty($val)).' / '.var_dump(is_null($val)).chr(10); }

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64.39 ms | 402 KiB | 5 Q