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<?php $str = '日本語'; var_dump(strlen($str)); var_dump(mb_strlen($str)); var_dump(iconv_strlen($str));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PsumG
function name:  (null)
number of ops:  18
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%E6%97%A5%E6%9C%AC%E8%AA%9E'
    4     1        INIT_FCALL                                               'var_dump'
          2        STRLEN                                           ~2      !0
          3        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    5     5        INIT_FCALL                                               'var_dump'
          6        INIT_FCALL                                               'mb_strlen'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $4      
          9        SEND_VAR                                                 $4
         10        DO_ICALL                                                 
    6    11        INIT_FCALL                                               'var_dump'
         12        INIT_FCALL_BY_NAME                                       'iconv_strlen'
         13        SEND_VAR_EX                                              !0
         14        DO_FCALL                                      0  $6      
         15        SEND_VAR                                                 $6
         16        DO_ICALL                                                 
         17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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