note 75731 added to function.array-diff

I needed a function to only remove the element the amount of times he appears in the second array. In other words, if you have Array(1, 1, 2) and Array(1), the return value should be Array(1, 2). So I built this function right here: <?php function array_diff_once(){ if(($args = func_num_args()) < 2) return false; $arr1 = func_get_arg(0); $arr2 = func_get_arg(1); if(!is_array($arr1) || !is_array($arr2)) return false; foreach($arr2 as $remove){ foreach($arr1 as $k=>$v){ if((string)$v === (string)$remove){ //NOTE: if you need the diff to be STRICT, remove both the '(string)'s unset($arr1[$k]); break; //That's pretty much the only difference from the real array_diff :P } } } //Handle more than 2 arguments $c = $args; while($c > 2){ $c--; $arr1 = array_diff_once($arr1, func_get_arg($args-$c+1)); } return $arr1; } $arr1 = Array("blue", "four"=>4, "color"=>"red", "blue", "green", "green", "name"=>"jon", "green"); $arr2 = Array("4", "red", "blue", "green"); print_r(array_diff_once($arr1, $arr2)); ?> This prints: Array ( [1] => blue [3] => green [name] => jon [4] => green ) Note that it removes the elements left to right, opposite to what you might expect; in my case the order of elements had no importance. Fixing that would require a small variation. ---- Server IP: 212.199.163.191 Probable Submitter: 194.90.189.52 ---- Manual Page -- http://www.php.net/manual/en/function.array-diff.php Edit -- https://master.php.net/note/edit/75731 Del: integrated -- https://master.php.net/note/delete/75731/integrated Del: useless -- https://master.php.net/note/delete/75731/useless Del: bad code -- https://master.php.net/note/delete/75731/bad+code Del: spam -- https://master.php.net/note/delete/75731/spam Del: non-english -- https://master.php.net/note/delete/75731/non-english Del: in docs -- https://master.php.net/note/delete/75731/in+docs Del: other reasons-- https://master.php.net/note/delete/75731 Reject -- https://master.php.net/note/reject/75731 Search -- https://master.php.net/manage/user-notes.php