http://derickrethans.nl/vld.php  
http://www.qinvent.com/cyrj/deZender  
原文网址：http://www.google988.com/article.asp?id=65
两个不同网站的解决方案,其中一个网站是基于Linux的解密方法.  
另外一个是国人自己做的论坛方式在线解密.价格昂贵.可以在线
试用一个帖子.
破解ZEND加密PHP的源程序代码在这里了  
那个什么青风发明工作室基本用的是这个东西
http://www.derickrethans.nl/vld.php  

下载在这里  
  
http://pecl.php.net/package/vld/0.8.0
==================  
大致介绍在这里  
==================  
Vulcan Logic Disassembler
The Vulcan Logic Disassembler hooks into the Zend Engine and dumps all the opcodes (execution units) of a script. It was written as as a beginning of an encoder, but I never got the time for that. It can be used to see what is going on in the Zend Engine.
New Features in 0.8
PHP 5.0 / PHP 5.1 support.
vld will only show opcodes if the setting vld.active is set to 1.  
New Features in 0.6
Class methods info is only dumped if they contain some user defined functions.  
Clean up the framework for better opcode display.  
Print extended value for function calls (# of args in that case).  
Op code elements are only printed when they are actually used.  
Download and Installation Instructions  
The extension is not totally finished yet, but it works fine for me. If you have questions, feel free to send me an e-mail (but read this first) at derick at php dot net. If you like this piece of software, feel free to checkout my wishlist or Andrei's. This improves chances that we will be continuing developing VLD.
You can download the source here or get it from CVS. The CVS root is "srmread@cvs.vl-srm.net:/repository", the module is "vle" (not "vld") and the password is "srmread".
It's not hard to use this extension, but it might not work with all PHP versions. Here are the instructions to get it to work:  
Unpack the tarball: tar -xzf vld-0.8.0.tgz.  
cd into the newly created directory.
Create the configure script: phpize  
Now run "./configure" followed by "make install".  
That's it, if you now run PHP from the command line and add the -dvld.active=1 parameter VLD will spit out the opcodes:
php -dvld.active=1 program.php
解密ZEND加密后的PHP文件 http://www.huanle.net/down/vld.php
先下载： vld-0.8.0
下载地址　http://www.huanle.net/down/vld.php
执行
#tar -xzf vld-0.8.0.tgz //解压  
#mv vld-0.8.0 vld //重命名
#cd -R vld ../php-4.3.8/ext //拷贝vld目录到php的解压目录下的ext中
#cd php-4.3.8
#rm configure //删除configure,因为下面的buildconf会重新生成新的configure
#./buildconf //如果出现错误,就按提示加上相应的参数.  
#./configure --with-mysql --with-apxs2=/usr/www/bin/apxs --enable-vld 重新检查php  
#make 编译  
#make install 安装
服务器必须先安装ZendOptimizer
运行Zend后的文件,查看源代码就可以看到了.

方法二：
只要你有ｌｉｎｕｘ主機，再裝一個程序，就能瀏覽源碼了．

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_vld.h"
#include "srm_oparray.h"

static zend_op_array* (*old_compile_file)(zend_file_handle* file_handle, int type TSRMLS_DC);
static zend_op_array* vld_compile_file(zend_file_handle*, int TSRMLS_DC);

static void (*old_execute)(zend_op_array *op_array TSRMLS_DC);
static void vld_execute(zend_op_array *op_array TSRMLS_DC);


function_entry vld_functions[] = {
{NULL, NULL, NULL}
};


zend_module_entry vld_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"vld",
vld_functions,
PHP_MINIT(vld),
PHP_MSHUTDOWN(vld),
PHP_RINIT(vld),
PHP_RSHUTDOWN(vld),
PHP_MINFO(vld),
#if ZEND_MODULE_API_NO >= 20010901
"0.8.0",
#endif
STANDARD_MODULE_PROPERTIES
};


#ifdef COMPILE_DL_VLD
ZEND_GET_MODULE(vld)
#endif

ZEND_BEGIN_MODULE_GLOBALS(vld)
int active;
int skip_prepend;
int skip_append;
int execute;
ZEND_END_MODULE_GLOBALS(vld)

ZEND_DECLARE_MODULE_GLOBALS(vld)

#ifdef ZTS
#define VLD_G(v) TSRMG(vld_globals_id, zend_vld_globals *, v)
#else
#define VLD_G(v) (vld_globals.v)
#endif

PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("vld.active", "0", PHP_INI_SYSTEM, OnUpdateBool, active, zend_vld_globals, vld_globals)
STD_PHP_INI_ENTRY("vld.skip_prepend", "0", PHP_INI_SYSTEM, OnUpdateBool, skip_prepend, zend_vld_globals, vld_globals)
STD_PHP_INI_ENTRY("vld.skip_append", "0", PHP_INI_SYSTEM, OnUpdateBool, skip_append, zend_vld_globals, vld_globals)
STD_PHP_INI_ENTRY("vld.execute", "1", PHP_INI_SYSTEM, OnUpdateBool, execute, zend_vld_globals, vld_globals)
PHP_INI_END()

static void vld_init_globals(zend_vld_globals *vld_globals)
{
vld_globals->active = 0;
vld_globals->skip_prepend = 0;
vld_globals->skip_append = 0;
vld_globals->execute = 1;
}


PHP_MINIT_FUNCTION(vld)
{
ZEND_INIT_MODULE_GLOBALS(vld, vld_init_globals, NULL);
REGISTER_INI_ENTRIES();
old_compile_file = zend_compile_file;
old_execute = zend_execute;

return SUCCESS;
}


PHP_MSHUTDOWN_FUNCTION(vld)
{
UNREGISTER_INI_ENTRIES();

zend_compile_file = old_compile_file;
zend_execute = old_execute;

return SUCCESS;
}


PHP_RINIT_FUNCTION(vld)
{
if (VLD_G(active)) {
zend_compile_file = vld_compile_file;
if (!VLD_G(execute)) {
zend_execute = vld_execute;
}
}
return SUCCESS;
}


PHP_RSHUTDOWN_FUNCTION(vld)
{
zend_compile_file = old_compile_file;
zend_execute = old_execute;

return SUCCESS;
}


PHP_MINFO_FUNCTION(vld)
{
php_info_print_table_start();
php_info_print_table_header(2, "vld support", "enabled");
php_info_print_table_end();

}

static int vld_check_fe (zend_op_array *fe, zend_bool *have_fe TSRMLS_DC)
{
if (fe->type == ZEND_USER_FUNCTION) {
*have_fe = 1;
}

return 0;
}

static int vld_dump_fe (zend_op_array *fe TSRMLS_DC)
{
if (fe->type == ZEND_USER_FUNCTION) {
fprintf(stderr, "Function %s:
", fe->function_name);
vld_dump_oparray(fe);
fprintf(stderr, "End of function %s.

", fe->function_name);
}

return ZEND_HASH_APPLY_KEEP;
}

#ifdef ZEND_ENGINE_2
static int vld_dump_cle (zend_class_entry **class_entry TSRMLS_DC)
#else
static int vld_dump_cle (zend_class_entry *class_entry TSRMLS_DC)
#endif
{
zend_class_entry *ce;
zend_bool have_fe = 0;

#ifdef ZEND_ENGINE_2
ce = *class_entry;
#else
ce = class_entry;
#endif

if (ce->type != ZEND_INTERNAL_CLASS) {
zend_hash_apply_with_argument(&ce->function_table, (apply_func_arg_t) vld_check_fe, (void *)&have_fe TSRMLS_CC);
if (have_fe) {
fprintf(stderr, "Class %s:
", ce->name);
zend_hash_apply(&ce->function_table, (apply_func_t) vld_dump_fe TSRMLS_CC);
fprintf(stderr, "End of class %s.

", ce->name);
} else {
fprintf(stderr, "Class %s: [no user functions]
", ce->name);
}
}

return ZEND_HASH_APPLY_KEEP;
}

/* {{{ zend_op_array vld_compile_file (file_handle, type)
* This function provides a hook for compilation */
static zend_op_array *vld_compile_file(zend_file_handle *file_handle, int type TSRMLS_DC)
{
zend_op_array *op_array;

if (!VLD_G(execute) &&
((VLD_G(skip_prepend) && PG(auto_prepend_file) && PG(auto_prepend_file)[0] && PG(auto_prepend_file) == file_handle->filename)
(VLD_G(skip_append) && PG(auto_append_file) && PG(auto_append_file)[0] && PG(auto_append_file) == file_handle->filename)))
{
zval nop;
ZVAL_STRINGL(&nop, "RETURN ;", 8, 0);
return compile_string(&nop, "NOP" TSRMLS_CC);;
}

op_array = old_compile_file (file_handle, type TSRMLS_CC);

if (op_array) {
vld_dump_oparray (op_array);
}

zend_hash_apply (CG(function_table), (apply_func_t) vld_dump_fe TSRMLS_CC);
zend_hash_apply (CG(class_table), (apply_func_t) vld_dump_cle TSRMLS_CC);

return op_array;
}
/* }}} */

/* {{{ void vld_execute(zend_op_array *op_array TSRMLS_DC)
* This function provides a hook for execution */
static void vld_execute(zend_op_array *op_array TSRMLS_DC)
{
// nothing to do
}
/* }}} */

原文网址：http://www.google988.com/article.asp?id=65