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<?php $word = 'umweltfreundilch'; //real life example :/ preg_match('/^(?U)(.*[aeiouyäöü][^aeiouyäöü])(.*)$/Xu', $word, $matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vEvuc
function name:  (null)
number of ops:  10
compiled vars:  !0 = $word, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'umweltfreundilch'
    4     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5E%28%3FU%29%28.%2A%5Baeiouy%C3%A4%C3%B6%C3%BC%5D%5B%5Eaeiouy%C3%A4%C3%B6%C3%BC%5D%29%28.%2A%29%24%2FXu'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
    5     6        INIT_FCALL                                               'var_dump'
          7        SEND_VAR                                                 !1
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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