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<?php $file='abactor abaculus abacus Abadite'; $result = []; foreach(str_split($file) as $char) { $result[$char]=isset($result[$char]) ?'*'.$result[$char] :$char; } print_r($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 6, Position 2 = 17
Branch analysis from position: 6
2 jumps found. (Code = 78) Position 1 = 7, Position 2 = 17
Branch analysis from position: 7
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 13
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
Branch analysis from position: 17
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 17
filename:       /in/aIr6C
function name:  (null)
number of ops:  22
compiled vars:  !0 = $file, !1 = $result, !2 = $char
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'abactor%0Aabaculus%0Aabacus%0AAbadite'
    8     1        ASSIGN                                                   !1, <array>
    9     2        INIT_FCALL                                               'str_split'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $5      
          5      > FE_RESET_R                                       $6      $5, ->17
          6    > > FE_FETCH_R                                               $6, !2, ->17
   11     7    >   ISSET_ISEMPTY_DIM_OBJ                         0          !1, !2
          8      > JMPZ                                                     ~8, ->13
   12     9    >   FETCH_DIM_R                                      ~9      !1, !2
         10        CONCAT                                           ~10     '%2A', ~9
         11        QM_ASSIGN                                        ~11     ~10
         12      > JMP                                                      ->14
   13    13    >   QM_ASSIGN                                        ~11     !2
   11    14    >   ASSIGN_DIM                                               !1, !2
   13    15        OP_DATA                                                  ~11
    9    16      > JMP                                                      ->6
         17    >   FE_FREE                                                  $6
   15    18        INIT_FCALL                                               'print_r'
         19        SEND_VAR                                                 !1
         20        DO_ICALL                                                 
         21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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