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<?php $array = [ ['city' => 'NewYork', 'cash' => '1000'], ['city' => 'Philadelphia', 'cash' => '2300'], ['city' => 'NewYork', 'cash' => '2000'] ]; $result = []; foreach ($array as $a) { if (!isset($result[$a['city']])) { $result[$a['city']] = $a; // store temporary city-keyed result array (avoid Notices) } else { $result[$a['city']]['cash'] += $a['cash']; // add current value to previous value } } var_export(array_values($result)); // remove temporary keys
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 18
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 18
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 17
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 18
filename:       /in/GZDM7
function name:  (null)
number of ops:  26
compiled vars:  !0 = $array, !1 = $result, !2 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    9     1        ASSIGN                                                       !1, <array>
   10     2      > FE_RESET_R                                           $5      !0, ->18
          3    > > FE_FETCH_R                                                   $5, !2, ->18
   11     4    >   FETCH_DIM_R                                          ~6      !2, 'city'
          5        ISSET_ISEMPTY_DIM_OBJ                             0  ~7      !1, ~6
          6        BOOL_NOT                                             ~8      ~7
          7      > JMPZ                                                         ~8, ->12
   12     8    >   FETCH_DIM_R                                          ~9      !2, 'city'
          9        ASSIGN_DIM                                                   !1, ~9
         10        OP_DATA                                                      !2
   11    11      > JMP                                                          ->17
   14    12    >   FETCH_DIM_R                                          ~11     !2, 'city'
         13        FETCH_DIM_R                                          ~14     !2, 'cash'
         14        FETCH_DIM_RW                                         $12     !1, ~11
         15        ASSIGN_DIM_OP                    +=               1          $12, 'cash'
         16        OP_DATA                                                      ~14
   10    17    > > JMP                                                          ->3
         18    >   FE_FREE                                                      $5
   17    19        INIT_FCALL                                                   'var_export'
         20        INIT_FCALL                                                   'array_values'
         21        SEND_VAR                                                     !1
         22        DO_ICALL                                             $15     
         23        SEND_VAR                                                     $15
         24        DO_ICALL                                                     
         25      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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