The script protects the php code from copying with binding to the domain. The ability to bind multiple domains.
Ready script to protect the PHP script from copying and binding to multiple domains and host.

PHP security script, you need to add to the main PHP script, which allows you to protect it from copying and installation on other sites (domains, hosts).
PHP script binds its work to the specified domains (sites, hosts). At its launch, the PHP script determines the host (site, domain) on which it worked and performs a comparison with the allowed hosts (sites, domains) specified in the script settings. If the current domain is not found among the allowed ones, then the script stops its work, or performs other specified actions. The script allows you to add an unlimited number of allowed domains