i need help important about the license php

Hello I need help with

I want to help in the patch or in the creation of the license code, for example, in this way

    public function license( )
    {
        global $licene_number;
        global $domain_name;
        global $tmps;
        $url = "http://localhost/license.php?license=".$licene_number."&domain=".$domain_name;
        $licene_number = get_license_access( );
      $domain_name = get_domain( );
        if ( !function_exists( file_get_contents ) )
        {
            echo $tmps->print_error( "error" );
            exit( );
        }
        else
        {
            $result = @file_get_contents( $url );
            if ( $result != "SUCCESS" )
            {
                return "INVALID";
            }
        }
        return "SUCCESS";
    }

}

PHP:

How do I schedule a file license.php

 

What do you exactly want? please give more details

 

Thank you very, very to answer

I want programming a simple licensing system to protect my script
And to establish license number for each client