Fatal error: Uncaught Error: Undefined constant "DATABASE_HOST1" in /home/patentprofiler.com/public_html/database_configuration.php:17 Stack trace: #0 /home/patentprofiler.com/public_html/Ebook_Sales.php(31): include() #1 {main} thrown in /home/patentprofiler.com/public_html/database_configuration.php on line 17