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<?php mb_set_internal_encoding('utf-8'); echo mb_strlen('aäaä');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OYa3e
function name:  (null)
number of ops:  8
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL_BY_NAME                                       'mb_set_internal_encoding'
          1        SEND_VAL_EX                                              'utf-8'
          2        DO_FCALL                                      0          
    3     3        INIT_FCALL                                               'mb_strlen'
          4        SEND_VAL                                                 'a%C3%A4a%C3%A4'
          5        DO_ICALL                                         $1      
          6        ECHO                                                     $1
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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