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<?php $s2 = '<?xml version="1.0"?><!DOCTYPE kaboom [ <!ENTITY a "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"> ]> <kaboom>&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;&a;</kaboom>'; $doc = new DOMDocument(); $doc->loadXML($s2); echo strlen($doc->lastChild->nodeValue);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/uIurT
function name:  (null)
number of ops:  12
compiled vars:  !0 = $s2, !1 = $doc
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%3C%3Fxml+version%3D%221.0%22%3F%3E%3C%21DOCTYPE+kaboom+%5B%0A++%3C%21ENTITY+a+%22aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa%22%3E%0A%5D%3E%0A%3Ckaboom%3E%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%26a%3B%3C%2Fkaboom%3E'
    7     1        NEW                                              $3      'DOMDocument'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !1, $3
    8     4        INIT_METHOD_CALL                                         !1, 'loadXML'
          5        SEND_VAR_EX                                              !0
          6        DO_FCALL                                      0          
    9     7        FETCH_OBJ_R                                      ~7      !1, 'lastChild'
          8        FETCH_OBJ_R                                      ~8      ~7, 'nodeValue'
          9        STRLEN                                           ~9      ~8
         10        ECHO                                                     ~9
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
153.13 ms | 1385 KiB | 13 Q