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<?php $str = 'This is a string of wooords.'; echo preg_replace('/([aeiou]{1})([^aeiou]*)$/i', '$2', $str);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/RMCQ3
function name:  (null)
number of ops:  8
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'This+is+a+string+of+wooords.'
    4     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%28%5Baeiou%5D%7B1%7D%29%28%5B%5Eaeiou%5D%2A%29%24%2Fi'
          3        SEND_VAL                                                 '%242'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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