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<?php $string = "Zoe\u{0308}"; var_dump($string); echo "\n"; var_dump(substr($string, -1)); var_dump(mb_substr($string, -1)); var_dump(iconv_substr($string, -1)); var_dump(grapheme_substr($string, -1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kU9D5
function name:  (null)
number of ops:  31
compiled vars:  !0 = $string
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'Zoe%CC%88'
    5     1        INIT_FCALL                                                   'var_dump'
          2        SEND_VAR                                                     !0
          3        DO_ICALL                                                     
    6     4        ECHO                                                         '%0A'
    7     5        INIT_FCALL                                                   'var_dump'
          6        FRAMELESS_ICALL_2                substr              ~3      !0, -1
          7        SEND_VAL                                                     ~3
          8        DO_ICALL                                                     
    8     9        INIT_FCALL                                                   'var_dump'
         10        INIT_FCALL                                                   'mb_substr'
         11        SEND_VAR                                                     !0
         12        SEND_VAL                                                     -1
         13        DO_ICALL                                             $5      
         14        SEND_VAR                                                     $5
         15        DO_ICALL                                                     
    9    16        INIT_FCALL                                                   'var_dump'
         17        INIT_FCALL_BY_NAME                                           'iconv_substr'
         18        SEND_VAR_EX                                                  !0
         19        SEND_VAL_EX                                                  -1
         20        DO_FCALL                                          0  $7      
         21        SEND_VAR                                                     $7
         22        DO_ICALL                                                     
   10    23        INIT_FCALL                                                   'var_dump'
         24        INIT_FCALL_BY_NAME                                           'grapheme_substr'
         25        SEND_VAR_EX                                                  !0
         26        SEND_VAL_EX                                                  -1
         27        DO_FCALL                                          0  $9      
         28        SEND_VAR                                                     $9
         29        DO_ICALL                                                     
         30      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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