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<?php $array = [ ['user_id' => 82, 'ac_type' => 1], ['user_id' => 80, 'ac_type' => 5], ['user_id' => 76, 'ac_type' => 1], ['user_id' => 82, 'ac_type' => 2], ['user_id' => 80, 'ac_type' => 5] ]; foreach ($array as $a) { $result[$a['user_id']] ??= $a; // only store if first occurrence of user_id } var_export(array_values($result)); // re-index and print
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 14
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 14
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 14
filename:       /in/7G2ak
function name:  (null)
number of ops:  22
compiled vars:  !0 = $array, !1 = $a, !2 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   11     1      > FE_RESET_R                                           $4      !0, ->14
          2    > > FE_FETCH_R                                                   $4, !1, ->14
   12     3    >   FETCH_DIM_R                                          ~5      !1, 'user_id'
          4        COPY_TMP                                             ~6      ~5
          5        FETCH_DIM_IS                                         ~7      !2, ~5
          6        COALESCE                                             ~8      ~7
          7        ASSIGN_DIM                                           ~9      !2, ~6
          8        OP_DATA                                                      !1
          9        QM_ASSIGN                                            ~8      ~9
         10      > JMP                                                          ->12
         11*       FREE                                                         ~6
         12    >   FREE                                                         ~8
   11    13      > JMP                                                          ->2
         14    >   FE_FREE                                                      $4
   14    15        INIT_FCALL                                                   'var_export'
         16        INIT_FCALL                                                   'array_values'
         17        SEND_VAR                                                     !2
         18        DO_ICALL                                             $10     
         19        SEND_VAR                                                     $10
         20        DO_ICALL                                                     
         21      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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