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<?php var_dump(mb_convert_case("AあいうえおBBcC", MB_CASE_FOLD_SIMPLE, "ISO-2022-JP")); mb_substitute_character("none"); var_dump(mb_convert_case("AあいうえおBBcC", MB_CASE_FOLD_SIMPLE, "ISO-2022-JP"));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/J7kVC
function name:  (null)
number of ops:  20
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'mb_convert_case'
          2        SEND_VAL                                                 'A%E3%81%82%E3%81%84%E3%81%86%E3%81%88%E3%81%8ABBcC'
          3        SEND_VAL                                                 7
          4        SEND_VAL                                                 'ISO-2022-JP'
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
    4     8        INIT_FCALL                                               'mb_substitute_character'
          9        SEND_VAL                                                 'none'
         10        DO_ICALL                                                 
    5    11        INIT_FCALL                                               'var_dump'
         12        INIT_FCALL                                               'mb_convert_case'
         13        SEND_VAL                                                 'A%E3%81%82%E3%81%84%E3%81%86%E3%81%88%E3%81%8ABBcC'
         14        SEND_VAL                                                 7
         15        SEND_VAL                                                 'ISO-2022-JP'
         16        DO_ICALL                                         $3      
         17        SEND_VAR                                                 $3
         18        DO_ICALL                                                 
         19      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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