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<?php if (preg_match('/\bABČĎ\b/ui', 'ABČĎ')) echo 'OK'; else echo 'KO'; if (preg_match('/ABČĎ/ui', 'ABČĎ')) echo 'OK'; else echo 'KO';
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 7
Branch analysis from position: 5
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 16
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
Branch analysis from position: 15
filename:       /in/lZ1qt
function name:  (null)
number of ops:  17
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5CbAB%C4%8C%C4%8E%5Cb%2Fui'
          2        SEND_VAL                                                 'AB%C4%8C%C4%8E'
          3        DO_ICALL                                         $0      
          4      > JMPZ                                                     $0, ->7
          5    >   ECHO                                                     'OK'
          6      > JMP                                                      ->8
    3     7    >   ECHO                                                     'KO'
    5     8    >   INIT_FCALL                                               'preg_match'
          9        SEND_VAL                                                 '%2FAB%C4%8C%C4%8E%2Fui'
         10        SEND_VAL                                                 'AB%C4%8C%C4%8E'
         11        DO_ICALL                                         $1      
         12      > JMPZ                                                     $1, ->15
         13    >   ECHO                                                     'OK'
         14      > JMP                                                      ->16
    6    15    >   ECHO                                                     'KO'
         16    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.65 ms | 1386 KiB | 15 Q