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<?php var_dump( iconv_substr('20', 2, 1), substr('20', 2, 1), mb_substr('20', 2, 1) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/qhP6H
function name:  (null)
number of ops:  21
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
    4     1        INIT_FCALL_BY_NAME                                       'iconv_substr'
          2        SEND_VAL_EX                                              '20'
          3        SEND_VAL_EX                                              2
          4        SEND_VAL_EX                                              1
          5        DO_FCALL                                      0  $0      
          6        SEND_VAR                                                 $0
    5     7        INIT_FCALL                                               'substr'
          8        SEND_VAL                                                 '20'
          9        SEND_VAL                                                 2
         10        SEND_VAL                                                 1
         11        DO_ICALL                                         $1      
         12        SEND_VAR                                                 $1
    6    13        INIT_FCALL                                               'mb_substr'
         14        SEND_VAL                                                 '20'
         15        SEND_VAL                                                 2
         16        SEND_VAL                                                 1
         17        DO_ICALL                                         $2      
         18        SEND_VAR                                                 $2
         19        DO_ICALL                                                 
    7    20      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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177.3 ms | 1395 KiB | 19 Q