php - Sum of two indexes which are having same values with multi dimension Array -

i working multi dimensional array below php,

$return_array=   array     (         [0] => array             (                 [0] => 3_mar_2017                 [1] => 0                 [2] => 19                 [3] => 7                 [4] => 13                 [5] => 3                 [6] => 0                 [7] => 42             )          [1] => array             (                 [0] => yet closed                 [1] => 0                 [2] => 0                 [3] => 0                 [4] => 0                 [5] => 1                 [6] => 0                 [7] => 1             )          [2] => array             (                 [0] => 3_mar_2017                 [1] => 0                 [2] => 7                 [3] => 0                 [4] => 0                 [5] => 0                 [6] => 0                 [7] => 7             )          [3] => array             (                 [0] => 4_apr_2017                 [1] => 0                 [2] => 8                 [3] => 4                 [4] => 0                 [5] => 0                 [6] => 0                 [7] => 12             )        ) 

on 0th , 2nd indexs -> sub array of indexes -> 0th index common "3_mar_2017" ,i want sum 2 indexes , want result shown below,

 $final_return = array         (             [0] => array                 (                     [0] => 3_mar_2017                     [1] => 0                     [2] => 26                     [3] => 7                     [4] => 13                     [5] => 3                     [6] => 0                     [7] => 49                 )              [1] => array                 (                     [0] => yet closed                     [1] => 0                     [2] => 0                     [3] => 0                     [4] => 0                     [5] => 1                     [6] => 0                     [7] => 1                 )                 [2] => array                 (                     [0] => 4_apr_2017                     [1] => 0                     [2] => 8                     [3] => 4                     [4] => 0                     [5] => 0                     [6] => 0                     [7] => 12                 )            ) 

my tried code loop below,

 $tem_array = array();         $final_return = array();         foreach ($return_array $unique) {             if (!in_array($unique[0], $tem_array)) {                 array_push($tem_array, $unique[0]);                 $final_return[] = $unique;             } else {                 $index = array_search($unique[0], $tem_array);                 ($i = 1; $i < count($unique); $i++) {                     $final_return[$index][$i] = $final_return[$index][$i] + $unique[$i];                 }             }         } 

but if array size large ,may take time there simple solution. can person me required result minimum code ? appreciate best answer.

hope looking for

$temp1 = array(); $result = array();  foreach ($myarray $temp) {      if (!in_array($temp[0], $temp1)) {          array_push($temp1, $temp[0]); $result[] = $temp;      } else {          $id = array_search($temp[0], $temp1); ($i = 1; $i <= count($temp); $i++) {          $result[$id][$i] = $result[$id][$i] + $temp[$i];          }      }  }  

your first array like

array (     [0] => array         (             [0] => 13             [1] => 1             [2] => 2             [3] => 3         )      [1] => array         (             [0] => 14             [1] => 5             [2] => 6             [3] => 7         )      [2] => array         (             [0] => 13             [1] => 1             [2] => 2             [3] => 3         )  ) 

and result

array (     [0] => array         (             [0] => 13             [1] => 2             [2] => 4             [3] => 6         )      [1] => array         (             [0] => 14             [1] => 5             [2] => 6             [3] => 7         )  )