note 75611 added to function.sort

One more solution for multidimensional sort: variable functions. <?php // $sort used as variable function--can be natcasesort, for example function sort2d( &$arrIn, $index = null, $sort = 'sort') { // pseudo-secure--never allow user input into $sort if (strpos($sort, 'sort') === false) {$sort = 'sort';} $arrTemp = Array(); $arrOut = Array(); foreach ( $arrIn as $key=>$value ) { reset($value); $arrTemp[$key] = is_null($index) ? current($value) : $value[$index]; } $sort($arrTemp); foreach ( $arrTemp as $key=>$value ) { $arrOut[$key] = $arrIn[$key]; } $arrIn = $arrOut; } ?> It appears to me that there are only two algorithms being proposed here (several times each): 1) copy into temp, pass temp to sort function, re-order by temp 2) implement search function in PHP I'm curious whether anyone's implementation of (2) can beat (1) for speed. Someone have a fast PHP mergesort they can benchmark against this one? Obviously, the fact that the (1) solutions use at least two, possibly three times the memory is a drawback, but I expect that for most of us, speed is significantly more important than memory. Maybe I'll check it myself when I have a minute. ---- Server IP: 64.71.164.2 Probable Submitter: 63.253.43.10 ---- Manual Page -- http://www.php.net/manual/en/function.sort.php Edit -- https://master.php.net/note/edit/75611 Del: integrated -- https://master.php.net/note/delete/75611/integrated Del: useless -- https://master.php.net/note/delete/75611/useless Del: bad code -- https://master.php.net/note/delete/75611/bad+code Del: spam -- https://master.php.net/note/delete/75611/spam Del: non-english -- https://master.php.net/note/delete/75611/non-english Del: in docs -- https://master.php.net/note/delete/75611/in+docs Del: other reasons-- https://master.php.net/note/delete/75611 Reject -- https://master.php.net/note/reject/75611 Search -- https://master.php.net/manage/user-notes.php