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<?php $merged = [ 'a' => 'b', 'b' => 'c', 'c' => 'z', 'd' => 'a', 'e' => 'z' ]; $aliasesReduced = false; while(!$aliasesReduced) { $aliasesReduced = true; foreach($merged as $originalId => &$mergedId) { if (array_key_exists($mergedId, $merged)) { $mergedId = $merged[$mergedId]; $aliasesReduced = false; } } } print_r($aliases);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
2 jumps found. (Code = 44) Position 1 = 16, Position 2 = 3
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 3
2 jumps found. (Code = 125) Position 1 = 5, Position 2 = 13
Branch analysis from position: 5
2 jumps found. (Code = 126) Position 1 = 6, Position 2 = 13
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 12
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
Branch analysis from position: 12
Branch analysis from position: 13
2 jumps found. (Code = 44) Position 1 = 16, Position 2 = 3
Branch analysis from position: 16
Branch analysis from position: 3
Branch analysis from position: 13
filename:       /in/6gll2
function name:  (null)
number of ops:  20
compiled vars:  !0 = $merged, !1 = $aliasesReduced, !2 = $mergedId, !3 = $originalId, !4 = $aliases
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                                   !0, <array>
   13     1        ASSIGN                                                   !1, <false>
   14     2      > JMP                                                      ->14
   15     3    >   ASSIGN                                                   !1, <true>
   16     4      > FE_RESET_RW                                      $8      !0, ->13
          5    > > FE_FETCH_RW                                      ~9      $8, !2, ->13
          6    >   ASSIGN                                                   !3, ~9
   17     7        ARRAY_KEY_EXISTS                                         !2, !0
          8      > JMPZ                                                     ~11, ->12
   18     9    >   FETCH_DIM_R                                      ~12     !0, !2
         10        ASSIGN                                                   !2, ~12
   19    11        ASSIGN                                                   !1, <false>
   16    12    > > JMP                                                      ->5
         13    >   FE_FREE                                                  $8
   14    14    >   BOOL_NOT                                         ~15     !1
         15      > JMPNZ                                                    ~15, ->3
   25    16    >   INIT_FCALL                                               'print_r'
         17        SEND_VAR                                                 !4
         18        DO_ICALL                                                 
         19      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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