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<?php $s = '!¾a’z„  ]¹g¤FÉæ[øšwô'; $b = 'kaskkasdkaksd'; foreach (array($s, $b, '') as $i) { var_dump(preg_match('/^[\\x00\\x08\\x0B\\x0C\\x0E-\\x1F]*$/', $i, $match)); var_dump($match); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 6, Position 2 = 19
Branch analysis from position: 6
2 jumps found. (Code = 78) Position 1 = 7, Position 2 = 19
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 19
filename:       /in/JShNL
function name:  (null)
number of ops:  21
compiled vars:  !0 = $s, !1 = $b, !2 = $i, !3 = $match
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%21%C3%82%C2%BEa%C3%82%E2%80%99z%C3%82%E2%80%9E%C3%82%C2%A0+%5D%C3%82%C2%B9g%C3%82%C2%A4F%C3%83%E2%80%B0%C3%83%C2%A6%5B%C3%83%C2%B8%C3%82%C5%A1w%C3%83%C2%B4'
    4     1        ASSIGN                                                   !1, 'kaskkasdkaksd'
    6     2        INIT_ARRAY                                       ~6      !0
          3        ADD_ARRAY_ELEMENT                                ~6      !1
          4        ADD_ARRAY_ELEMENT                                ~6      ''
          5      > FE_RESET_R                                       $7      ~6, ->19
          6    > > FE_FETCH_R                                               $7, !2, ->19
    7     7    >   INIT_FCALL                                               'var_dump'
          8        INIT_FCALL                                               'preg_match'
          9        SEND_VAL                                                 '%2F%5E%5B%5Cx00%5Cx08%5Cx0B%5Cx0C%5Cx0E-%5Cx1F%5D%2A%24%2F'
         10        SEND_VAR                                                 !2
         11        SEND_REF                                                 !3
         12        DO_ICALL                                         $8      
         13        SEND_VAR                                                 $8
         14        DO_ICALL                                                 
    8    15        INIT_FCALL                                               'var_dump'
         16        SEND_VAR                                                 !3
         17        DO_ICALL                                                 
    6    18      > JMP                                                      ->6
         19    >   FE_FREE                                                  $7
    9    20      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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