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Protected script loaders (ixed loaders)

Protected script loaders are dynamically loaded PHP extensions which load the protected script, decrypt it and then run the bytecode. The Source code is never restored at any time, even in memory. There are different versions of the loaders available for different operating systems and PHP installations.The appropriate version of the loader will be automatically loaded by the protected script, if this is supported by your web server and PHP configuration.

SourceGuardian™ for PHP protected script loaders may also be installed manually in to a php.ini file - This is useful, for example, if automatic loading is not supported or if faster performance is required.

Protected Script Loaders will be updated periodically and the latest loaders are always freely available from:

http://www.sourceguardian.com/ixeds/

Installing with PHP version 5.2.5 and later

For all PHP versions prior to 5.2.5 all you need to run a protected script is a small decoder file which is simply included with your script and the ability to dynamically load modules at run time - the default install of PHP. For PHP 5.2.5 and newer you need to copy the decoder file into PHP's extension_dir folder. Even if your target platform is running in PHP Safe Mode (and hence won't allow dynamic module loads) or if dynamic loading is disabled for security reasons most hosting providers are happy to enable their servers with SourceGuardian compatibility server-wide with a single entry in the PHP.ini file.

Loader filename structure

The following provides an overview of the loader naming conventions:

ixed.X.Y.Zdd.os

X.Y

- major PHP version number (4.3 for 4.3.x, 5.0 for 5.0.x)

- minor PHP version number (2 for 5.0.2)
This part may be missed in the loader name which means that this loader is for all higher PHP versions:

·	ixed.4.3.lin - for all PHP 4.3.x versions

·	ixed.5.0.0.lin - for PHP 5.0.0 only

·	ixed.5.0.1.lin - for PHP 5.0.1 only

·	ixed.5.0.2.lin - for PHP 5.0.2 only

·	ixed.5.0.lin - for all PHP 5.0.3+ versions and higher

- optional code of supported encoder and system:

·	(missed) - this loader will load scripts protected with full version of SourceGuardian™ 4.0 for PHP

·	ev. - this loader will load scripts protected only with the evaluation version of SourceGuardian™ 4.0 for PHP

·	ts. - this loader will load scripts protected with the full version of SourceGuardian™ 4.0 for PHP and is suited for manual installation on systems with Thread Safety enabled PHP (see details below)

- three char code of operating system type. For example:

·	.win - Windows

·	.lin - Linux

·	.fre - FreeBSD

Automatic ixed loading

Most operating systems and installations of PHP will load the Protected scripts without any modification. PHP will be able to find and load the appropriate loader if the following conditions are met:

1) Operating system and PHP mode:

Linux or FreeBSD - PHP installed as CGI or CLI
Linux or FreeBSD - PHP installed as Apache module (with thread safety off)
Windows - PHP installed as CGI or CLI

2) Thread Safety is disabled and Safe Mode is off. You may check phpinfo() output for this.

3) dl() is enabled. You should have enable_dl=On in your php.ini.

4) The PHP extensions directory needs to exist. Please check that the extension_dir= option in php.ini points to the real directory. Some hosting companies have incorrect installations of PHP and this can cause problems.

5) The latest ixed loaders are installed in an /ixed/ subdirectory within your scripts directory or any parent directory. Examples are below:

Example 1:
(loaders are in the /ixed/ subdirectory within the scripts directory)

/home/mysite/www/myscript1.php - your protected script(s)
/home/mysite/www/myscript2.php - your protected script(s)
/home/mysite/www/subdir/otherscript1.php - other protected script(s)
/home/mysite/www/subdir/otherscript2.php - other protected script(s)
/home/mysite/www/ixed/ixed.* - script loaders

Example 2:
(loaders are in the /ixed/ subdirectory within any *parent* directory)

6) (For windows users only) extension_dir= option in php.ini should point to the directory located *on the same drive* with your document root and scripts directory.

Manual ixed installation

It is possible to Manually install the ixed and this is required in the following conditions:

1) Operating system and PHP mode:

Linux or FreeBSD - PHP installed as Apache module (with thread safety on)
Windows - PHP installed as Apache module (thread safety is always on)

2) If Thread Safety is enabled or Safe Mode is on. You may check phpinfo() output for this. PHP installed as Apache module under Windows will always have Thread Safety on.

3) If dl() is disabled. You have enable_dl=Off in your php.ini.

Manual installation may be used even if automatic loading is available. With appropriate and manually installed SourceGuardian™ loaders you give the maximum performance for your protected scripts. This is because the script will not need to search for a loader each time it runs.

For manual installation of SourceGuardian™ protected script loaders you should have access to the php.ini configuration file. Manual installation is easy:

1) Check phpinfo() output for PHP version, Thread Safety mode and extension_dir path.

2) Copy the latest loaders into the /ixed/ subdirectory of your PHP extension_dir

3) Add one line into your php.ini with the appropriate loader name. This will depend on your OS, PHP version, Thread Safety mode and SourceGuardian™ version (full or evaluation). Please refer to the "Loader filename structure" section above.

Examples:
(These are not the only possible variants, and are just provided as examples)

extension=ixed/ixed.4.3.lin # for Linux, non thread safe, PHP 4.3.x
extension=ixed/ixed.5.0.0.lin # for Linux, non thread safe, PHP 5.0.0
extension=ixed/ixed.5.0.1.lin # for Linux, non thread safe, PHP 5.0.1
extension=ixed/ixed.5.0.2.lin # for Linux, non thread safe, PHP 5.0.2
extension=ixed/ixed.5.0.lin # for Linux, non thread safe, PHP 5.0.3+

extension=ixed/ixed.5.0.0ts.lin # for Linux, thread safe, PHP 5.0.0
extension=ixed/ixed.5.0ts.lin # for Linux, thread safe, PHP 5.0.3+

extension=ixed/ixed.4.3.fre # for FreeBSD, non thread safe, PHP 4.3.x
extension=ixed/ixed.4.3ev.fre # for FreeBSD, PHP 4.3.x, evaluation version

extension=ixed/ixed.4.3.win # for Windows, PHP 4.3.x
extension=ixed/ixed.4.3ev.win # for Windows, PHP 4.3.x, evaluation version
extension=ixed/ixed.5.0.2.win # for Windows, PHP 5.0.2
extension=ixed/ixed.5.0.win # for Windows, PHP 5.0.3+
extension=ixed/ixed.5.0ev.win # for Windows, PHP 5.0.3+, evaluation version

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