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<?php $str = 'این یک متن تست است. اینجا ایران است'; echo preg_replace('/\bای/u', '', $str);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/FAh2G
function name:  (null)
number of ops:  5
compiled vars:  !0 = $str
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, '%D8%A7%DB%8C%D9%86+%DB%8C%DA%A9+%D9%85%D8%AA%D9%86+%D8%AA%D8%B3%D8%AA+%D8%A7%D8%B3%D8%AA.+%D8%A7%DB%8C%D9%86%D8%AC%D8%A7+%D8%A7%DB%8C%D8%B1%D8%A7%D9%86+%D8%A7%D8%B3%D8%AA'
    5     1        FRAMELESS_ICALL_3                preg_replace        ~2      '%2F%5Cb%D8%A7%DB%8C%2Fu', ''
          2        OP_DATA                                                      !0
          3        ECHO                                                         ~2
          4      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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