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<?php var_dump(putenv("PHP_PUTENV_NUL_TEST=va\0ue")); echo getenv('PHP_PUTENV_NUL_TEST'); echo getenv("PHP_PUTENV_NUL_TEST\0asd");
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ngSWJ
function name:  (null)
number of ops:  15
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                                   'var_dump'
          1        INIT_FCALL                                                   'putenv'
          2        SEND_VAL                                                     'PHP_PUTENV_NUL_TEST%3Dva%00ue'
          3        DO_ICALL                                             $0      
          4        SEND_VAR                                                     $0
          5        DO_ICALL                                                     
    3     6        INIT_FCALL                                                   'getenv'
          7        SEND_VAL                                                     'PHP_PUTENV_NUL_TEST'
          8        DO_ICALL                                             $2      
          9        ECHO                                                         $2
    4    10        INIT_FCALL                                                   'getenv'
         11        SEND_VAL                                                     'PHP_PUTENV_NUL_TEST%00asd'
         12        DO_ICALL                                             $3      
         13        ECHO                                                         $3
         14      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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