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<?php $myarray = array( [ 'messageId' => '5ACE9D8841', 'sender' => 'john@doe.com', ], [ 'messageId' => '7EE67D8170', 'sender' => 'dan@doe.com', ], [ 'messageId' => '8095FD8836', 'sender' => 'cat@doe.com', ], [ 'messageId' => ['brokenId' => '8095FD8836'], 'sender' => 'cat@doe.com', ], [ 'status' => 'wrong row', ], [ 'messageId' => '7EE67D8170', 'dest' => 'mitch@doe.com', 'status' => 'sent', 'date' => '2021-02-01 11:06:55', ], ); $result = array_reduce($myarray, function($rows, $item){ if (array_key_exists('messageId', $item) && is_scalar($item['messageId'])) { $rows = array_replace_recursive($rows ?? [], [$item['messageId'] => $item]); } return $rows; }); $result = array_values($result); print_r($result);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TXJjt
function name:  (null)
number of ops:  15
compiled vars:  !0 = $myarray, !1 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   32     1        INIT_FCALL                                                   'array_reduce'
          2        SEND_VAR                                                     !0
          3        DECLARE_LAMBDA_FUNCTION                              ~3      [0]
   37     4        SEND_VAL                                                     ~3
   32     5        DO_ICALL                                             $4      
          6        ASSIGN                                                       !1, $4
   39     7        INIT_FCALL                                                   'array_values'
          8        SEND_VAR                                                     !1
          9        DO_ICALL                                             $6      
         10        ASSIGN                                                       !1, $6
   41    11        INIT_FCALL                                                   'print_r'
         12        SEND_VAR                                                     !1
         13        DO_ICALL                                                     
         14      > RETURN                                                       1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 4, Position 2 = 7
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 17
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 17
Branch analysis from position: 7
filename:       /in/TXJjt
function name:  {closure:/in/TXJjt:32}
number of ops:  19
compiled vars:  !0 = $rows, !1 = $item
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   32     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   33     2        ARRAY_KEY_EXISTS                                     ~2      'messageId', !1
          3      > JMPZ_EX                                              ~2      ~2, ->7
          4    >   FETCH_DIM_R                                          ~3      !1, 'messageId'
          5        TYPE_CHECK                                      124  ~4      ~3
          6        BOOL                                                 ~2      ~4
          7    > > JMPZ                                                         ~2, ->17
   34     8    >   INIT_FCALL                                                   'array_replace_recursive'
          9        COALESCE                                             ~5      !0
         10        QM_ASSIGN                                            ~5      <array>
         11        SEND_VAL                                                     ~5
         12        FETCH_DIM_R                                          ~6      !1, 'messageId'
         13        INIT_ARRAY                                           ~7      !1, ~6
         14        SEND_VAL                                                     ~7
         15        DO_ICALL                                             $8      
         16        ASSIGN                                                       !0, $8
   36    17    > > RETURN                                                       !0
   37    18*     > RETURN                                                       null

End of Dynamic Function 0

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