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<?php $tests = [ '/[$-\w]/', '/[\w-$]/', '/[\w-]/', '/[-\w]/', '/[$-]/', '/[-$]/', ]; foreach($tests as $test) { echo "$test\n"; preg_match($test,''); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 9
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 9
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
filename:       /in/fk0Ij
function name:  (null)
number of ops:  11
compiled vars:  !0 = $tests, !1 = $test
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   12     1      > FE_RESET_R                                           $3      !0, ->9
          2    > > FE_FETCH_R                                                   $3, !1, ->9
   13     3    >   NOP                                                          
          4        FAST_CONCAT                                          ~4      !1, '%0A'
          5        ECHO                                                         ~4
   14     6        FRAMELESS_ICALL_2                preg_match          ~5      !1, ''
          7        FREE                                                         ~5
   12     8      > JMP                                                          ->2
          9    >   FE_FREE                                                      $3
   15    10      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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