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<?php readfile("php://filter/read=string.toupper|string.rot13/resource=http://www.nu.nl");
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/dSa9l
function name:  (null)
number of ops:  4
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'readfile'
          1        SEND_VAL                                                 'php%3A%2F%2Ffilter%2Fread%3Dstring.toupper%7Cstring.rot13%2Fresource%3Dhttp%3A%2F%2Fwww.nu.nl'
          2        DO_ICALL                                                 
          3      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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