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<?php class CategoryTree { protected $roots = []; public function addCategory($category, $parent) { if ($this->categoryExists($this->roots, $category)) { throw new InvalidArgumentException(); } if ($parent === null) { $this->tree[$category] = []; } $node = $findNode($parent, $this->root); if(!isset($node)) { throw new InvalidArgumentException(); } $node[$category] = []; } public function getChildren($parent) { $node = $findNode($parent, $this->root); if(!isset($node)) { throw new InvalidArgumentException(); } return array_keys($node); } public function findNode($node, &$root) { if (in_array($node, array_keys($root))) { return $root[$node]; } foreach ($root as $n) { return $this->findNode($node, $n); } } public function categoryExists($nodes, $category) { $exists = false; foreach($nodes as $node) { if (in_array($category, $this->getChildren($node))) { return true; } $exists = $this->categoryExists($node, $category); } return $exists; } } // For testing purposes (do not submit uncommented): $c = new CategoryTree; $c->addCategory('A', null); $c->addCategory('B', 'A'); $c->addCategory('C', 'A'); //echo implode(',', $c->getChildren('A'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kQpk6
function name:  (null)
number of ops:  16
compiled vars:  !0 = $c
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   55     0  E >   NEW                                              $1      'CategoryTree'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   56     3        INIT_METHOD_CALL                                         !0, 'addCategory'
          4        SEND_VAL_EX                                              'A'
          5        SEND_VAL_EX                                              null
          6        DO_FCALL                                      0          
   57     7        INIT_METHOD_CALL                                         !0, 'addCategory'
          8        SEND_VAL_EX                                              'B'
          9        SEND_VAL_EX                                              'A'
         10        DO_FCALL                                      0          
   58    11        INIT_METHOD_CALL                                         !0, 'addCategory'
         12        SEND_VAL_EX                                              'C'
         13        SEND_VAL_EX                                              'A'
         14        DO_FCALL                                      0          
   59    15      > RETURN                                                   1

Class CategoryTree:
Function addcategory:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 12
Branch analysis from position: 9
1 jumps found. (Code = 108) Position 1 = -2
Branch analysis from position: 12
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 17
Branch analysis from position: 14
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 30
Branch analysis from position: 27
1 jumps found. (Code = 108) Position 1 = -2
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 17
filename:       /in/kQpk6
function name:  addCategory
number of ops:  33
compiled vars:  !0 = $category, !1 = $parent, !2 = $node, !3 = $findNode
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    9     2        INIT_METHOD_CALL                                         'categoryExists'
          3        CHECK_FUNC_ARG                                           
          4        FETCH_OBJ_FUNC_ARG                               $4      'roots'
          5        SEND_FUNC_ARG                                            $4
          6        SEND_VAR_EX                                              !0
          7        DO_FCALL                                      0  $5      
          8      > JMPZ                                                     $5, ->12
   10     9    >   NEW                                              $6      'InvalidArgumentException'
         10        DO_FCALL                                      0          
         11      > THROW                                         0          $6
   13    12    >   TYPE_CHECK                                    2          !1
         13      > JMPZ                                                     ~8, ->17
   14    14    >   FETCH_OBJ_W                                      $9      'tree'
         15        ASSIGN_DIM                                               $9, !0
         16        OP_DATA                                                  <array>
   17    17    >   INIT_DYNAMIC_CALL                                        !3
         18        SEND_VAR_EX                                              !1
         19        CHECK_FUNC_ARG                                           
         20        FETCH_OBJ_FUNC_ARG                               $11     'root'
         21        SEND_FUNC_ARG                                            $11
         22        DO_FCALL                                      0  $12     
         23        ASSIGN                                                   !2, $12
   18    24        ISSET_ISEMPTY_CV                                 ~14     !2
         25        BOOL_NOT                                         ~15     ~14
         26      > JMPZ                                                     ~15, ->30
   19    27    >   NEW                                              $16     'InvalidArgumentException'
         28        DO_FCALL                                      0          
         29      > THROW                                         0          $16
   21    30    >   ASSIGN_DIM                                               !2, !0
         31        OP_DATA                                                  <array>
   22    32      > RETURN                                                   null

End of function addcategory

Function getchildren:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 14
Branch analysis from position: 11
1 jumps found. (Code = 108) Position 1 = -2
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kQpk6
function name:  getChildren
number of ops:  19
compiled vars:  !0 = $parent, !1 = $node, !2 = $findNode
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   24     0  E >   RECV                                             !0      
   26     1        INIT_DYNAMIC_CALL                                        !2
          2        SEND_VAR_EX                                              !0
          3        CHECK_FUNC_ARG                                           
          4        FETCH_OBJ_FUNC_ARG                               $3      'root'
          5        SEND_FUNC_ARG                                            $3
          6        DO_FCALL                                      0  $4      
          7        ASSIGN                                                   !1, $4
   27     8        ISSET_ISEMPTY_CV                                 ~6      !1
          9        BOOL_NOT                                         ~7      ~6
         10      > JMPZ                                                     ~7, ->14
   28    11    >   NEW                                              $8      'InvalidArgumentException'
         12        DO_FCALL                                      0          
         13      > THROW                                         0          $8
   30    14    >   INIT_FCALL                                               'array_keys'
         15        SEND_VAR                                                 !1
         16        DO_ICALL                                         $10     
         17      > RETURN                                                   $10
   31    18*     > RETURN                                                   null

End of function getchildren

Function findnode:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
2 jumps found. (Code = 77) Position 1 = 13, Position 2 = 21
Branch analysis from position: 13
2 jumps found. (Code = 78) Position 1 = 14, Position 2 = 21
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 21
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 21
filename:       /in/kQpk6
function name:  findNode
number of ops:  23
compiled vars:  !0 = $node, !1 = $root, !2 = $n
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   33     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   34     2        INIT_FCALL                                               'in_array'
          3        SEND_VAR                                                 !0
          4        INIT_FCALL                                               'array_keys'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                         $3      
          7        SEND_VAR                                                 $3
          8        DO_ICALL                                         $4      
          9      > JMPZ                                                     $4, ->12
   35    10    >   FETCH_DIM_R                                      ~5      !1, !0
         11      > RETURN                                                   ~5
   37    12    > > FE_RESET_R                                       $6      !1, ->21
         13    > > FE_FETCH_R                                               $6, !2, ->21
   38    14    >   INIT_METHOD_CALL                                         'findNode'
         15        SEND_VAR_EX                                              !0
         16        SEND_VAR_EX                                              !2
         17        DO_FCALL                                      0  $7      
         18        FE_FREE                                                  $6
         19      > RETURN                                                   $7
   37    20*       JMP                                                      ->13
         21    >   FE_FREE                                                  $6
   40    22      > RETURN                                                   null

End of function findnode

Function categoryexists:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 4, Position 2 = 21
Branch analysis from position: 4
2 jumps found. (Code = 78) Position 1 = 5, Position 2 = 21
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 21
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 21
filename:       /in/kQpk6
function name:  categoryExists
number of ops:  24
compiled vars:  !0 = $nodes, !1 = $category, !2 = $exists, !3 = $node
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   42     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   43     2        ASSIGN                                                   !2, <false>
   44     3      > FE_RESET_R                                       $5      !0, ->21
          4    > > FE_FETCH_R                                               $5, !3, ->21
   45     5    >   INIT_FCALL                                               'in_array'
          6        SEND_VAR                                                 !1
          7        INIT_METHOD_CALL                                         'getChildren'
          8        SEND_VAR_EX                                              !3
          9        DO_FCALL                                      0  $6      
         10        SEND_VAR                                                 $6
         11        DO_ICALL                                         $7      
         12      > JMPZ                                                     $7, ->15
   46    13    >   FE_FREE                                                  $5
         14      > RETURN                                                   <true>
   48    15    >   INIT_METHOD_CALL                                         'categoryExists'
         16        SEND_VAR_EX                                              !3
         17        SEND_VAR_EX                                              !1
         18        DO_FCALL                                      0  $8      
         19        ASSIGN                                                   !2, $8
   44    20      > JMP                                                      ->4
         21    >   FE_FREE                                                  $5
   50    22      > RETURN                                                   !2
   51    23*     > RETURN                                                   null

End of function categoryexists

End of class CategoryTree.

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