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<?php $data = mcrypt_create_iv(16, MCRYPT_DEV_URANDOM); var_dump(mb_substr($data, 5, 10)); var_dump(substr($data, 5, 10));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DPJWh
function name:  (null)
number of ops:  23
compiled vars:  !0 = $data
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL_BY_NAME                                       'mcrypt_create_iv'
          1        SEND_VAL_EX                                              16
          2        FETCH_CONSTANT                                   ~1      'MCRYPT_DEV_URANDOM'
          3        SEND_VAL_EX                                              ~1
          4        DO_FCALL                                      0  $2      
          5        ASSIGN                                                   !0, $2
    3     6        INIT_FCALL                                               'var_dump'
          7        INIT_FCALL                                               'mb_substr'
          8        SEND_VAR                                                 !0
          9        SEND_VAL                                                 5
         10        SEND_VAL                                                 10
         11        DO_ICALL                                         $4      
         12        SEND_VAR                                                 $4
         13        DO_ICALL                                                 
    4    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'substr'
         16        SEND_VAR                                                 !0
         17        SEND_VAL                                                 5
         18        SEND_VAL                                                 10
         19        DO_ICALL                                         $6      
         20        SEND_VAR                                                 $6
         21        DO_ICALL                                                 
         22      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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