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<?php $isset = true; $array = array(); $notSetArray = array(0=>''); $string = ''; // Test Source function Test9_2() { global $isset; /* The Test */ $t = microtime(true); while($i < 2000) { empty($isset); ++$i; } return (microtime(true) - $t); } // Variable Clean-up function Test9_End() { global $isset, $array, $string; unset($isset, $array, $string); }
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0