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<?php foreach (['hey foo', 'afoo', 'abarf00', 'puff'] as $s) { var_dump($s, preg_match('/(?!.*(foo|bar)/s', $s)); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 1, Position 2 = 11
Branch analysis from position: 1
2 jumps found. (Code = 78) Position 1 = 2, Position 2 = 11
Branch analysis from position: 2
1 jumps found. (Code = 42) Position 1 = 1
Branch analysis from position: 1
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 11
filename:       /in/cQRRq
function name:  (null)
number of ops:  13
compiled vars:  !0 = $s
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E > > FE_RESET_R                                       $1      <array>, ->11
          1    > > FE_FETCH_R                                               $1, !0, ->11
    4     2    >   INIT_FCALL                                               'var_dump'
          3        SEND_VAR                                                 !0
          4        INIT_FCALL                                               'preg_match'
          5        SEND_VAL                                                 '%2F%28%3F%21.%2A%28foo%7Cbar%29%2Fs'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $2      
          8        SEND_VAR                                                 $2
          9        DO_ICALL                                                 
    3    10      > JMP                                                      ->1
         11    >   FE_FREE                                                  $1
    5    12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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