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10
10 ways to “exploit” PHP that you might not know
2. brushup: What is PHP?
The most overengineered template engine ever.
Often mistaken as a sort of programming language due to its
“your-favorite-language-like” syntatic features.
The world’s first template engine upon which another template
engine is implemented.
16. zend_objects.c
zend_object_handlers.c
zend_objects_API.c zend_alloc.c
Objects API Allocator
zend_execute.c zend_API.c
zend_execute_API.c zend_float.c
zend_vm_execute.h
zend_operators.c
Virtual Machine Utilities zend_stream.c
zend_qsort.c
zend_gc.c Garbage
Stack Linked List
Collector
zend_compile.c zend_stack.c
zend_opcode.c Hashtable zend_ptr_stack.c
Opcode emitter zend_llist.c
basic data structure zend_hash.c
Parser Lexer Parser Lexer
zend_language_parser.y
zend_language_scanner.l zend_ini.c
language core ini parser zend_ini_parser.y
zend_ini_scanner.c
17. <?php
?
$a = 1;
$b = 2;
$c = $a + $b;
?>
18. T_OPEN_TAG
<?php T_VARIABLE
$a = 1; ‘=’
$b = 2; T_LNUMBER
$c = $a + $b; ‘;’
?> T_VARIABLE
‘=’
T_LNUMBER
‘;’
T_VARIABLE
‘=’
Lexer T_VARIABLE
‘+’
T_VARIABLE
‘;’
T_CLOSE_TAG
19. zend_op
T_OPEN_TAG ASSIGN
T_VARIABLE
‘=’ zend_op
T_LNUMBER
‘;’
ASSIGN
T_VARIABLE zend_op
‘=’
T_LNUMBER ADD
‘;’
T_VARIABLE zend_op
‘=’
T_VARIABLE
ASSIGN
‘+’
T_VARIABLE
‘;’ zend_op_array
T_CLOSE_TAG
Parser Opcode
emitter
22. op_type
opline_num
constant var op_array
jmp_addr
24. $a = $b + $c + $d; ASSIGN
result
ADD op1 op2
ADD ADD
ASSIGN result
op1 op2
ADD
result
op1 op2
TMP_VAR
27. zend_op ASSIGN
ASSIGN
zend_op FETCH_R
ASSIGN
zend_op FETCH_W
ADD
zend_op FETCH_DIM_R
ASSIGN
FETCH_DIM_W
zend_op_array
ECHO
ADD
handlers
34. array(1, 2, 3, 4, 5)->join(’,’)
Java autoboxing PHP
?
autobox __autobox()
38. <?php $a = << ?><?html>
<body>
<?div id=”{$id}”>test</?div>
</body>
</?html>
<?php
// $a DOM
var_dump($a);
?>
47. #include "boost/php/module.hpp"
#include "boost/php/function.hpp"
using namespace boost;
class m001_module
: public php::module,
public php::function_container<m002_module> {
public:
class handler
: public php::module::handler {
public:
handler(m001_module* mod)
:php::module::handler(mod) {}
};
public:
m001_module(zend_module_entry* entry)
: php::module(entry) {
// entry->functions =
defun("your_function", &handler::your_function);
}
};
#define BOOST_PHP_MODULE_NAME m001
#define BOOST_PHP_MODULE_CAPITALIZED_NAME M001
#define BOOST_PHP_MODULE_VERSION "0.1"
#define BOOST_PHP_MODULE_CLASS_NAME m001_module
#include "boost/php/module_def.hpp"
