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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 8.5.0


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