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<?php $usernameCheck = 'dani'; if ((bool)!preg_match('/[^a-z_\-0-9]/i', $usernameCheck)) { echo 'ok'; } else { echo 'false';}
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 11
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/YEdmo
function name:  (null)
number of ops:  12
compiled vars:  !0 = $usernameCheck
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'dani'
    6     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5B%5Ea-z_%5C-0-9%5D%2Fi'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $2      
          5        BOOL_NOT                                         ~3      $2
          6        BOOL                                             ~4      ~3
          7      > JMPZ                                                     ~4, ->10
          8    >   ECHO                                                     'ok'
          9      > JMP                                                      ->11
         10    >   ECHO                                                     'false'
         11    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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