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<?php $locations = array( 3 => array("Building", 2), 2 => array("Area", 1), 0 => array("Floor", 3), 1 => array("City"), 4 => array("Room", 0), 13 => array("Building1", 12), 12 => array("Area1", 11), 14 => array("Room1", 10), 10 => array("Floor1", 13), 11 => array("City1") ); $dic = []; $roots = []; foreach($locations as $k => $e) { if (count($e) == 2) $dic[$e[1]] = $k; else $roots[] = $k; } foreach($roots as $root) { $path = []; $node = $root; while (isset($dic[$node])) { $path[] = $locations[$node][0]; $node = $dic[$node]; } $path[] = $locations[$node][0]; echo implode(",", array_reverse($path)) . PHP_EOL; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 4, Position 2 = 16
Branch analysis from position: 4
2 jumps found. (Code = 78) Position 1 = 5, Position 2 = 16
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 13
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 15
Branch analysis from position: 15
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 16
2 jumps found. (Code = 77) Position 1 = 18, Position 2 = 44
Branch analysis from position: 18
2 jumps found. (Code = 78) Position 1 = 19, Position 2 = 44
Branch analysis from position: 19
1 jumps found. (Code = 42) Position 1 = 28
Branch analysis from position: 28
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 22
Branch analysis from position: 30
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
Branch analysis from position: 22
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 22
Branch analysis from position: 30
Branch analysis from position: 22
Branch analysis from position: 44
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 44
Branch analysis from position: 16
filename:       /in/Cr7D4
function name:  (null)
number of ops:  46
compiled vars:  !0 = $locations, !1 = $dic, !2 = $roots, !3 = $e, !4 = $k, !5 = $root, !6 = $path, !7 = $node
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   16     1        ASSIGN                                                   !1, <array>
   17     2        ASSIGN                                                   !2, <array>
   18     3      > FE_RESET_R                                       $11     !0, ->16
          4    > > FE_FETCH_R                                       ~12     $11, !3, ->16
          5    >   ASSIGN                                                   !4, ~12
   19     6        COUNT                                            ~14     !3
          7        IS_EQUAL                                                 ~14, 2
          8      > JMPZ                                                     ~15, ->13
   20     9    >   FETCH_DIM_R                                      ~16     !3, 1
         10        ASSIGN_DIM                                               !1, ~16
         11        OP_DATA                                                  !4
   19    12      > JMP                                                      ->15
   22    13    >   ASSIGN_DIM                                               !2
         14        OP_DATA                                                  !4
   18    15    > > JMP                                                      ->4
         16    >   FE_FREE                                                  $11
   24    17      > FE_RESET_R                                       $19     !2, ->44
         18    > > FE_FETCH_R                                               $19, !5, ->44
   25    19    >   ASSIGN                                                   !6, <array>
   26    20        ASSIGN                                                   !7, !5
   27    21      > JMP                                                      ->28
   28    22    >   FETCH_DIM_R                                      ~23     !0, !7
         23        FETCH_DIM_R                                      ~24     ~23, 0
         24        ASSIGN_DIM                                               !6
         25        OP_DATA                                                  ~24
   29    26        FETCH_DIM_R                                      ~25     !1, !7
         27        ASSIGN                                                   !7, ~25
   27    28    >   ISSET_ISEMPTY_DIM_OBJ                         0          !1, !7
         29      > JMPNZ                                                    ~27, ->22
   31    30    >   FETCH_DIM_R                                      ~29     !0, !7
         31        FETCH_DIM_R                                      ~30     ~29, 0
         32        ASSIGN_DIM                                               !6
         33        OP_DATA                                                  ~30
   32    34        INIT_FCALL                                               'implode'
         35        SEND_VAL                                                 '%2C'
         36        INIT_FCALL                                               'array_reverse'
         37        SEND_VAR                                                 !6
         38        DO_ICALL                                         $31     
         39        SEND_VAR                                                 $31
         40        DO_ICALL                                         $32     
         41        CONCAT                                           ~33     $32, '%0A'
         42        ECHO                                                     ~33
   24    43      > JMP                                                      ->18
         44    >   FE_FREE                                                  $19
   33    45      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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