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@ 2014-08-14T02:33:45Z

<?php
$uid = 0;
if ( !$uid || !is_numeric($uid) ) {
        throw new \InvalidArgumentException( "Invalid UID passed to " . __METHOD__  );     
      }

Output
Performance
VLD
References
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is_numeric: documentation ( source)

preferences:dark modelive preview

29.55 ms | 402 KiB | 5 Q