// a valid connection. if (DB::isError($db)) { die ($db->getMessage()); } .... // You can disconnect from the database with: $db->disconnect(); ?>
数据源(上例中的$dsn 参数)有以下允许的格式：（从Pear/DB.php的parseDSN方法复制而来）
* phptype: Database backend used in PHP (mysql, odbc etc.)
* dbsyntax: Database used with regards to SQL syntax etc.
* protocol: Communication protocol to use (tcp, unix etc.)
* hostspec: Host specification (hostname[:port])
* database: Database to use on the DBMS server
* username: User name for login
* password: Password for login
*
* The format of the supplied DSN is in its fullest form:
*
* phptype(dbsyntax)://username:password@protocol+hostspec/database
*
* Most variations are allowed:
*
* phptype://username:password@protocol+hostspec:110//usr/db_file.db
* phptype://username:password@hostspec/database_name
* phptype://username:password@hostspec
* phptype://username@hostspec
* phptype://hostspec/database
* phptype://hostspec
* phptype(dbsyntax)
* phptype
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现在支持的数据库有 (在 phptype DSN 部分):
mysql -> MySQL
pgsql -> PostgreSQL
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