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<?php $pattern = '/[^\w]fox\s/'; if (preg_match($pattern, 'The quick brown fox jumps over the lazy dog')) { echo "'fox' is present..."; } else echo "'fox' is not present..."; ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/mt7Kg
function name:  (null)
number of ops:  10
compiled vars:  !0 = $pattern
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%2F%5B%5E%5Cw%5Dfox%5Cs%2F'
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 'The+quick+brown+fox+jumps+over+the+lazy+dog'
          4        DO_ICALL                                         $2      
          5      > JMPZ                                                     $2, ->8
    5     6    >   ECHO                                                     '%27fox%27+is+present...'
          7      > JMP                                                      ->9
    8     8    >   ECHO                                                     '%27fox%27+is+not+present...'
    9     9    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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