Description: ------------ I add the following line to use DB_mysql class: require_once "DB/mysql.php"; At first report a error that DB_common could not extend an undefined pear class.So I update the package DB with the latest version, then the error disappeared. But an error as following was reported: Fatal error: Undefined class name 'db' in d:\php\PEAR\DB\mysql.php on line 115 so I add the following line at the head of file "mysql.php": require_once 'DB.php'; then the error info disappears.

The only file you're supposed to require is DB.php. Please read the manual. http://pear.php.net/manual/en/package.database.db.intro-connect.php