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<?php var_dump(mb_internal_encoding()); var_dump(mb_strtolower('你好?')); mb_internal_encoding('UTF-8'); var_dump(mb_strtolower('你好?'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/H8gOL
function name:  (null)
number of ops:  21
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'mb_internal_encoding'
          2        DO_ICALL                                         $0      
          3        SEND_VAR                                                 $0
          4        DO_ICALL                                                 
    3     5        INIT_FCALL                                               'var_dump'
          6        INIT_FCALL                                               'mb_strtolower'
          7        SEND_VAL                                                 '%E4%BD%A0%E5%A5%BD%3F'
          8        DO_ICALL                                         $2      
          9        SEND_VAR                                                 $2
         10        DO_ICALL                                                 
    4    11        INIT_FCALL                                               'mb_internal_encoding'
         12        SEND_VAL                                                 'UTF-8'
         13        DO_ICALL                                                 
    5    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'mb_strtolower'
         16        SEND_VAL                                                 '%E4%BD%A0%E5%A5%BD%3F'
         17        DO_ICALL                                         $5      
         18        SEND_VAR                                                 $5
         19        DO_ICALL                                                 
         20      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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