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<?php preg_match('/\bПривіт\W+(?:\w+\W+){0,6}?світу\b/ui', 'Привіт, світу!', $matches).PHP_EOL; var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/FdgWO
function name:  (null)
number of ops:  11
compiled vars:  !0 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5Cb%D0%9F%D1%80%D0%B8%D0%B2%D1%96%D1%82%5CW%2B%28%3F%3A%5Cw%2B%5CW%2B%29%7B0%2C6%7D%3F%D1%81%D0%B2%D1%96%D1%82%D1%83%5Cb%2Fui'
          2        SEND_VAL                                                 '%D0%9F%D1%80%D0%B8%D0%B2%D1%96%D1%82%2C+%D1%81%D0%B2%D1%96%D1%82%D1%83%21'
          3        SEND_REF                                                 !0
          4        DO_ICALL                                         $1      
          5        CONCAT                                           ~2      $1, '%0A'
          6        FREE                                                     ~2
    4     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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