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<?php $str = "Příliš"; var_dump (mb_substring($str, 0, NULL));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aQK2t
function name:  (null)
number of ops:  10
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'P%C5%99%C3%ADli%C5%A1'
    3     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL_BY_NAME                                       'mb_substring'
          3        SEND_VAR_EX                                              !0
          4        SEND_VAL_EX                                              0
          5        SEND_VAL_EX                                              null
          6        DO_FCALL                                      0  $2      
          7        SEND_VAR                                                 $2
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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