MySQL is a RDBMS which can run as a server in a computer system and can provide multi-user access to one or more databases. Apache and MySQL can be integrated to build software systems where access to databases may be required. Configuration issues may lead to problems in connecting to the MySQL databases. If the MySQL adapter is not available, the php.ini file may be changed to include the parameter for the MySQL adapter in the dynamic extension section. After including the php_mysql.dll, a connection to the MySQL database can be made from a PHP script.