3v4l.org

run code in 300+ PHP versions simultaneously
<?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 8.0.0


preferences:
137.15 ms | 999 KiB | 15 Q