note 119645 added to function.abs

<?php $arr = array(); for ($i = 0; $i < 1000; $i++) $arr[] = rand(-100, 100); $start = microtime(true); for ($i = 0; $i < 1000; $i++){ foreach ($arr as $v) $v = abs($v); } echo number_format(microtime(true) - $start, 4).'<br />'; $start = microtime(true); for ($i = 0; $i < 1000; $i++){ foreach ($arr as $v) if ($v < 0) $v = abs($v); } echo number_format(microtime(true) - $start, 4).'<br />'; $start = microtime(true); for ($i = 0; $i < 1000; $i++){ foreach ($arr as $v) if ($v < 0) $v *= -1; } echo number_format(microtime(true) - $start, 4).'<br />'; ?> Result: 1.4061 0.9697 0.2805 Conclusion: better to check before using the feature that the number is less than zero. Even better use multiplication by -1 than this function. ---- Server IP: 72.52.91.14 Probable Submitter: 194.12.65.233 ---- Manual Page -- http://php.net/manual/en/function.abs.php Edit -- https://master.php.net/note/edit/119645 Del: integrated -- https://master.php.net/note/delete/119645/integrated Del: useless -- https://master.php.net/note/delete/119645/useless Del: bad code -- https://master.php.net/note/delete/119645/bad+code Del: spam -- https://master.php.net/note/delete/119645/spam Del: non-english -- https://master.php.net/note/delete/119645/non-english Del: in docs -- https://master.php.net/note/delete/119645/in+docs Del: other reasons-- https://master.php.net/note/delete/119645 Reject -- https://master.php.net/note/reject/119645 Search -- https://master.php.net/manage/user-notes.php