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<?php $array = array( 55 => array( 'ident' => 'test 1', 'depth' => 1, ), 77 => array( 'parent_id' => 55, 'ident' => 'test 2', 'depth' => 2, ), 109 => array( 'parent_id' => 77, 'ident' => 'test 3', 'depth' => 3, ), 78 => array( 'parent_id' => 55, 'ident' => 'test 4', 'depth' => 2, ), 77 => array( 'ident' => 'test 5', 'depth' => 1, ) ); foreach ($array as $key => &$sub) { if (isset($sub['parent_id'])) { $array[$sub['parent_id']]['children'][$key] = &$sub; } } unset($sub); // unset the reference to make sure to not overwrite it later... // now remove the entries with parents foreach ($array as $key => $sub) { if (!isset($sub['children'])) unset($array[$key]); } var_dump($array);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 125) Position 1 = 2, Position 2 = 12
Branch analysis from position: 2
2 jumps found. (Code = 126) Position 1 = 3, Position 2 = 12
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 11
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 11
Branch analysis from position: 12
2 jumps found. (Code = 77) Position 1 = 15, Position 2 = 22
Branch analysis from position: 15
2 jumps found. (Code = 78) Position 1 = 16, Position 2 = 22
Branch analysis from position: 16
2 jumps found. (Code = 43) Position 1 = 20, Position 2 = 21
Branch analysis from position: 20
1 jumps found. (Code = 42) Position 1 = 15
Branch analysis from position: 15
Branch analysis from position: 21
Branch analysis from position: 22
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 22
Branch analysis from position: 12
filename:       /in/QWOb4
function name:  (null)
number of ops:  27
compiled vars:  !0 = $array, !1 = $sub, !2 = $key
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   28     1      > FE_RESET_RW                                      $4      !0, ->12
          2    > > FE_FETCH_RW                                      ~5      $4, !1, ->12
          3    >   ASSIGN                                                   !2, ~5
   29     4        ISSET_ISEMPTY_DIM_OBJ                         0          !1, 'parent_id'
          5      > JMPZ                                                     ~7, ->11
   30     6    >   FETCH_DIM_R                                      ~8      !1, 'parent_id'
          7        FETCH_DIM_W                                      $9      !0, ~8
          8        FETCH_DIM_W                                      $10     $9, 'children'
          9        FETCH_DIM_W                                      $11     $10, !2
         10        ASSIGN_REF                                               $11, !1
   28    11    > > JMP                                                      ->2
         12    >   FE_FREE                                                  $4
   33    13        UNSET_CV                                                 !1
   36    14      > FE_RESET_R                                       $13     !0, ->22
         15    > > FE_FETCH_R                                       ~14     $13, !1, ->22
         16    >   ASSIGN                                                   !2, ~14
   37    17        ISSET_ISEMPTY_DIM_OBJ                         0  ~16     !1, 'children'
         18        BOOL_NOT                                         ~17     ~16
         19      > JMPZ                                                     ~17, ->21
   38    20    >   UNSET_DIM                                                !0, !2
   36    21    > > JMP                                                      ->15
         22    >   FE_FREE                                                  $13
   40    23        INIT_FCALL                                               'var_dump'
         24        SEND_VAR                                                 !0
         25        DO_ICALL                                                 
         26      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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