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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 $a) { if (!isset($result[$a['user_id']])) { $result[$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 = 11
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 11
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 10
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 10
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 11
filename:       /in/GAjpv
function name:  (null)
number of ops:  19
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, ->11
          2    > > FE_FETCH_R                                               $4, !1, ->11
   12     3    >   FETCH_DIM_R                                      ~5      !1, 'user_id'
          4        ISSET_ISEMPTY_DIM_OBJ                         0  ~6      !2, ~5
          5        BOOL_NOT                                         ~7      ~6
          6      > JMPZ                                                     ~7, ->10
   13     7    >   FETCH_DIM_R                                      ~8      !1, 'user_id'
          8        ASSIGN_DIM                                               !2, ~8
          9        OP_DATA                                                  !1
   11    10    > > JMP                                                      ->2
         11    >   FE_FREE                                                  $4
   16    12        INIT_FCALL                                               'var_export'
         13        INIT_FCALL                                               'array_values'
         14        SEND_VAR                                                 !2
         15        DO_ICALL                                         $10     
         16        SEND_VAR                                                 $10
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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