note 76501 added to function.array-sum

This is a simple approach to subtract array, both indexed and associative. function array_sub($arr) { if (!is_array($arr) || count($arr) == 0) { return false; } else { // get first element $base = array_shift($arr); if (count($arr) == 1) { // If only one element, return its return $base; } foreach ($arr as $val) { $base -= $val; } return $base; } } // example $arr1 = array(3, 2, 3); echo array_sub($arr1); // Output: -2 $arr2 = array(3.5, 2, 3); echo array_sub($arr2); // Output: -1.5 $arr3 = array('a' => 3, 'b' => 2, 'c' => 3); echo array_sub($arr3); // Output: -2 ---- Server IP: 202.67.10.139 Probable Submitter: 202.69.101.171 ---- Manual Page -- http://www.php.net/manual/en/function.array-sum.php Edit -- https://master.php.net/note/edit/76501 Del: integrated -- https://master.php.net/note/delete/76501/integrated Del: useless -- https://master.php.net/note/delete/76501/useless Del: bad code -- https://master.php.net/note/delete/76501/bad+code Del: spam -- https://master.php.net/note/delete/76501/spam Del: non-english -- https://master.php.net/note/delete/76501/non-english Del: in docs -- https://master.php.net/note/delete/76501/in+docs Del: other reasons-- https://master.php.net/note/delete/76501 Reject -- https://master.php.net/note/reject/76501 Search -- https://master.php.net/manage/user-notes.php