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<?php $userName = "黑夜路人好"; //echo strlen($userName); echo mb_substr($userName, 0, 1);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kF4dq
function name:  (null)
number of ops:  8
compiled vars:  !0 = $userName
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%E9%BB%91%E5%A4%9C%E8%B7%AF%E4%BA%BA%E5%A5%BD'
    5     1        INIT_FCALL                                               'mb_substr'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 0
          4        SEND_VAL                                                 1
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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