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<?php preg_match_all( '/\X/u' , "\xE1\x8D\x9F" , $matches , PREG_SET_ORDER ); print_r($matches); exit(0);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 79) Position 1 = -2
filename:       /in/2oWVu
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_all'
          1        SEND_VAL                                                 '%2F%5CX%2Fu'
          2        SEND_VAL                                                 '%E1%8D%9F'
          3        SEND_REF                                                 !0
          4        SEND_VAL                                                 2
          5        DO_ICALL                                                 
    5     6        INIT_FCALL                                               'print_r'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
    7     9      > EXIT                                                     0
         10*     > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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