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<?php $que = 'bbb ahhj aaab cc iiik xxx fjjj baaaaaab yyyaaa'; echo preg_replace("/\\b([a-z])\\1+(?!\\1|\\b)|(?<=([a-z]))((?!\\2)[a-z])\\3+/","$1$3",$que);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/piVCo
function name:  (null)
number of ops:  5
compiled vars:  !0 = $que
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'bbb+ahhj+aaab+cc+iiik+xxx+fjjj+baaaaaab+yyyaaa'
    4     1        FRAMELESS_ICALL_3                preg_replace        ~2      '%2F%5Cb%28%5Ba-z%5D%29%5C1%2B%28%3F%21%5C1%7C%5Cb%29%7C%28%3F%3C%3D%28%5Ba-z%5D%29%29%28%28%3F%21%5C2%29%5Ba-z%5D%29%5C3%2B%2F', '%241%243'
          2        OP_DATA                                                      !0
          3        ECHO                                                         ~2
          4      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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