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<?php $part = 'Никита'; var_dump((bool)preg_match('/^([A-Za-zА-Яа-я]+){1}$/u', $part));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3XvFJ
function name:  (null)
number of ops:  10
compiled vars:  !0 = $part
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%D0%9D%D0%B8%D0%BA%D0%B8%D1%82%D0%B0'
    3     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'preg_match'
          3        SEND_VAL                                                 '%2F%5E%28%5BA-Za-z%D0%90-%D0%AF%D0%B0-%D1%8F%5D%2B%29%7B1%7D%24%2Fu'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        BOOL                                             ~3      $2
          7        SEND_VAL                                                 ~3
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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