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<?php $string = "u\xcc\x88"; var_dump($string); var_dump(mb_substr($string, 0, 1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5geOr
function name:  (null)
number of ops:  13
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'u%CC%88'
    4     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    5     4        INIT_FCALL                                               'var_dump'
          5        INIT_FCALL                                               'mb_substr'
          6        SEND_VAR                                                 !0
          7        SEND_VAL                                                 0
          8        SEND_VAL                                                 1
          9        DO_ICALL                                         $3      
         10        SEND_VAR                                                 $3
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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