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<?php $purchases = array( array('product_id' => 7, 'receipt' => "R13D13"), array('product_id' => 5, 'receipt' => "Y28Z14"), array('product_id' => 7, 'receipt' => "R02310"), array('product_id' => 5, 'receipt' => "E11403") ); $result = []; foreach($purchases as $key => $purchase) { if (!isset($result[$purchase["product_id"]])) { $result[$purchase["product_id"]] = $purchase; } } print_r($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 13
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 13
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 12
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 12
Branch analysis from position: 13
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
filename:       /in/mqkLH
function name:  (null)
number of ops:  18
compiled vars:  !0 = $purchases, !1 = $result, !2 = $purchase, !3 = $key
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   10     1        ASSIGN                                                   !1, <array>
   11     2      > FE_RESET_R                                       $6      !0, ->13
          3    > > FE_FETCH_R                                       ~7      $6, !2, ->13
          4    >   ASSIGN                                                   !3, ~7
   12     5        FETCH_DIM_R                                      ~9      !2, 'product_id'
          6        ISSET_ISEMPTY_DIM_OBJ                         0  ~10     !1, ~9
          7        BOOL_NOT                                         ~11     ~10
          8      > JMPZ                                                     ~11, ->12
   13     9    >   FETCH_DIM_R                                      ~12     !2, 'product_id'
         10        ASSIGN_DIM                                               !1, ~12
         11        OP_DATA                                                  !2
   11    12    > > JMP                                                      ->3
         13    >   FE_FREE                                                  $6
   17    14        INIT_FCALL                                               'print_r'
         15        SEND_VAR                                                 !1
         16        DO_ICALL                                                 
         17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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