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@ 2014-02-03T00:10:52Z

<?php
 $value = true;
 $v = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
 if ($v === null)
 {
   var_dump($value);
   echo 'wat?!';
 }

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
filter_var: documentation ( source)

preferences:dark modelive preview

43.48 ms | 402 KiB | 5 Q