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<?php $root = array( 1=>'cat1', 2=>'cat2', 3=>'cat3' ); $child_1 = array( 1=>'sub_cat1', 2=>'sub_cat2', 3=>'sub_cat3' ); $child_2 = array( 1=>'sub_sub_cat1', 2=>'sub_sub_cat2', 3=>'sub_sub_cat3' ); function getAllCombinationsArray($source_arrays = array(), $key = '', $value = ''){ $return = array(); foreach(array_shift($source_arrays) as $ck => $cv) { if(!empty($source_arrays)) { $return += getAllCombinationsArray($source_arrays, $key.$ck.'_', $value.$cv.' -> '); } else { $return[$key.$ck] = $value.$cv; } } return $return; } print_r(getAllCombinationsArray(array($root, $child_1, $child_2)));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ik11v
function name:  (null)
number of ops:  13
compiled vars:  !0 = $root, !1 = $child_1, !2 = $child_2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <array>
    5     2        ASSIGN                                                   !2, <array>
   21     3        INIT_FCALL                                               'print_r'
          4        INIT_FCALL                                               'getallcombinationsarray'
          5        INIT_ARRAY                                       ~6      !0
          6        ADD_ARRAY_ELEMENT                                ~6      !1
          7        ADD_ARRAY_ELEMENT                                ~6      !2
          8        SEND_VAL                                                 ~6
          9        DO_FCALL                                      0  $7      
         10        SEND_VAR                                                 $7
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Function getallcombinationsarray:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 8, Position 2 = 29
Branch analysis from position: 8
2 jumps found. (Code = 78) Position 1 = 9, Position 2 = 29
Branch analysis from position: 9
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 24
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 28
Branch analysis from position: 28
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 24
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 29
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 29
filename:       /in/ik11v
function name:  getAllCombinationsArray
number of ops:  32
compiled vars:  !0 = $source_arrays, !1 = $key, !2 = $value, !3 = $return, !4 = $cv, !5 = $ck
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV_INIT                                        !0      <array>
          1        RECV_INIT                                        !1      ''
          2        RECV_INIT                                        !2      ''
    8     3        ASSIGN                                                   !3, <array>
   10     4        INIT_FCALL                                               'array_shift'
          5        SEND_REF                                                 !0
          6        DO_ICALL                                         $7      
          7      > FE_RESET_R                                       $8      $7, ->29
          8    > > FE_FETCH_R                                       ~9      $8, !4, ->29
          9    >   ASSIGN                                                   !5, ~9
   11    10        ISSET_ISEMPTY_CV                                 ~11     !0
         11        BOOL_NOT                                         ~12     ~11
         12      > JMPZ                                                     ~12, ->24
   12    13    >   INIT_FCALL_BY_NAME                                       'getAllCombinationsArray'
         14        SEND_VAR_EX                                              !0
         15        CONCAT                                           ~13     !1, !5
         16        CONCAT                                           ~14     ~13, '_'
         17        SEND_VAL_EX                                              ~14
         18        CONCAT                                           ~15     !2, !4
         19        CONCAT                                           ~16     ~15, '+-%3E+'
         20        SEND_VAL_EX                                              ~16
         21        DO_FCALL                                      0  $17     
         22        ASSIGN_OP                                     1          !3, $17
         23      > JMP                                                      ->28
   14    24    >   CONCAT                                           ~19     !1, !5
         25        CONCAT                                           ~21     !2, !4
         26        ASSIGN_DIM                                               !3, ~19
         27        OP_DATA                                                  ~21
   10    28    > > JMP                                                      ->8
         29    >   FE_FREE                                                  $8
   18    30      > RETURN                                                   !3
   19    31*     > RETURN                                                   null

End of function getallcombinationsarray

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