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@ 2014-01-30T23:02:57Z

<?php

var_dump(filter_var(null, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive previewkey bindings

25.71 ms | 405 KiB | 5 Q