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<?php echo mb_strlen('รกรก');
based on 9kk52
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/56ce2
function name:  (null)
number of ops:  5
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'mb_strlen'
         1        SEND_VAL                                                 '%C3%A1%C3%A1'
         2        DO_ICALL                                         $0      
         3        ECHO                                                     $0
         4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.1.0