note 82588 added to function.sizeof

To explain previous comments: the reason that the FOR loop runs faster on LARGE arrays if you set its size to an array first (using count() or sizeof() ) is pretty simple. It's because if you use <?php for ($i = 0; $i < sizeof($huge_array); $i++) { code } ?> every time the FOR loop checks its condition (is $i less than sizeof($huge_array) ), it must run the sizeof() function on $huge_array again. This is what causes the extra processing time, which can become significant on larger arrays. As a side note, this has been thoroughly commented on both correctly and incorrectly in the User Contributed Notes for the count() function. Users Jaik, Wulfson, and Anonymous have summed this particular matter up pretty well in their posts http://www.php.net/manual/en/function.count.php#78741 , http://www.php.net/manual/en/function.count.php#78931 , and http://www.php.net/manual/en/function.count.php#79238 . ---- Server IP: 69.147.83.197 Probable Submitter: 146.186.149.139 (proxied: 66.71.78.55) ---- Manual Page -- http://www.php.net/manual/en/function.sizeof.php Edit -- https://master.php.net/note/edit/82588 Del: integrated -- https://master.php.net/note/delete/82588/integrated Del: useless -- https://master.php.net/note/delete/82588/useless Del: bad code -- https://master.php.net/note/delete/82588/bad+code Del: spam -- https://master.php.net/note/delete/82588/spam Del: non-english -- https://master.php.net/note/delete/82588/non-english Del: in docs -- https://master.php.net/note/delete/82588/in+docs Del: other reasons-- https://master.php.net/note/delete/82588 Reject -- https://master.php.net/note/reject/82588 Search -- https://master.php.net/manage/user-notes.php