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<?php $array = [ 'vehicle info' => [ 'one' => [ 'submodel' => 'LX', 'engine' => 2.3 ], 'two' => [ 'color' => 'blue', 'year' => 2007, 'wheels' => 4 ], 'three' => [ 'submodel' => 'LX', 'make' => 'Ford', 'model' => 'F-150', 'offroad' => 'No' ] ] ]; $soughtKeys = array_flip(['submodel', 'offroad']); function earlyReturningRecursion(array $array, array $soughtKeys, array &$result = []): array { foreach ($array as $key => $value) { if (!array_diff_key($soughtKeys, $result)) { return $result; } elseif (is_array($value)) { earlyReturningRecursion($value, $soughtKeys, $result); } elseif (isset($soughtKeys[$key]) && !isset($result[$key])) { $result[$key] = "$key is $value"; } } return $result; } var_export(earlyReturningRecursion($array, $soughtKeys));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NfXnF
function name:  (null)
number of ops:  13
compiled vars:  !0 = $array, !1 = $soughtKeys
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   23     1        INIT_FCALL                                                   'array_flip'
          2        SEND_VAL                                                     <array>
          3        DO_ICALL                                             $3      
          4        ASSIGN                                                       !1, $3
   38     5        INIT_FCALL                                                   'var_export'
          6        INIT_FCALL                                                   'earlyreturningrecursion'
          7        SEND_VAR                                                     !0
          8        SEND_VAR                                                     !1
          9        DO_FCALL                                          0  $5      
         10        SEND_VAR                                                     $5
         11        DO_ICALL                                                     
         12      > RETURN                                                       1

Function earlyreturningrecursion:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 4, Position 2 = 36
Branch analysis from position: 4
2 jumps found. (Code = 78) Position 1 = 5, Position 2 = 36
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 16
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 24
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 35
Branch analysis from position: 35
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 24
2 jumps found. (Code = 46) Position 1 = 26, Position 2 = 29
Branch analysis from position: 26
2 jumps found. (Code = 43) Position 1 = 30, Position 2 = 35
Branch analysis from position: 30
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 35
Branch analysis from position: 29
Branch analysis from position: 36
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 36
filename:       /in/NfXnF
function name:  earlyReturningRecursion
number of ops:  41
compiled vars:  !0 = $array, !1 = $soughtKeys, !2 = $result, !3 = $value, !4 = $key
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   25     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
          2        RECV_INIT                                            !2      <array>
   27     3      > FE_RESET_R                                           $5      !0, ->36
          4    > > FE_FETCH_R                                           ~6      $5, !3, ->36
          5    >   ASSIGN                                                       !4, ~6
   28     6        INIT_FCALL                                                   'array_diff_key'
          7        SEND_VAR                                                     !1
          8        SEND_VAR                                                     !2
          9        DO_ICALL                                             $8      
         10        BOOL_NOT                                             ~9      $8
         11      > JMPZ                                                         ~9, ->16
   29    12    >   VERIFY_RETURN_TYPE                                           !2
         13        FE_FREE                                                      $5
         14      > RETURN                                                       !2
   28    15*       JMP                                                          ->35
   30    16    >   TYPE_CHECK                                      128          !3
         17      > JMPZ                                                         ~10, ->24
   31    18    >   INIT_FCALL_BY_NAME                                           'earlyReturningRecursion'
         19        SEND_VAR_EX                                                  !3
         20        SEND_VAR_EX                                                  !1
         21        SEND_VAR_EX                                                  !2
         22        DO_FCALL                                          0          
   30    23      > JMP                                                          ->35
   32    24    >   ISSET_ISEMPTY_DIM_OBJ                             0  ~12     !1, !4
         25      > JMPZ_EX                                              ~12     ~12, ->29
         26    >   ISSET_ISEMPTY_DIM_OBJ                             0  ~13     !2, !4
         27        BOOL_NOT                                             ~14     ~13
         28        BOOL                                                 ~12     ~14
         29    > > JMPZ                                                         ~12, ->35
   33    30    >   ROPE_INIT                                         3  ~17     !4
         31        ROPE_ADD                                          1  ~17     ~17, '+is+'
         32        ROPE_END                                          2  ~16     ~17, !3
         33        ASSIGN_DIM                                                   !2, !4
         34        OP_DATA                                                      ~16
   27    35    > > JMP                                                          ->4
         36    >   FE_FREE                                                      $5
   36    37        VERIFY_RETURN_TYPE                                           !2
         38      > RETURN                                                       !2
   37    39*       VERIFY_RETURN_TYPE                                           
         40*     > RETURN                                                       null

End of function earlyreturningrecursion

Generated using Vulcan Logic Dumper, using php 8.5.0


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