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Trong kịch bản này, chúng tôi có thể sẽ phải tạo ra một userid, ngẫu nhiên, tạm thời và có thể sẽ sử dụng TableDrop () sau khi trật tự được tạo ra để giải phóng tài nguyên hệ thống. Nó là vô cùng hữu ích để sử dụng các yêu cầu () chức năng để kết hợp các mô tả lớp học của bạn và các tờ khai | Simpo PDF Merge and Split Unregistered Version - http www.simpopdf.com PHP Support for Database Connectivity PHP supports API s for accessing large numbers of databases like Oracle Sybase PostgreSQL MySQL etc. The PHP programs to access the data from the database on the fly can use these API s. Open Database Connectivity ODBC is a standard Application Programming Interface API for accessing a database that has PHP support. This can be used for writing generic database applications. By generic I mean that the same application code will work for all the Databases supporting the ODBC standard. There will be a performance overhead with ODBC if the database doesn t support ODBC natively and moreover ODBC being a generic standard supports only generic features. If you want to use some specific feature of a database then one should use the language API of that database. In this section we will cover PHP API s for accessing MySQL databases. You can look at the PHP documentation for APIs to access other databases. Lets briefly cover the features of MySQL before we look into the PHP API s. MySQL Database MySQL is a small compact easy to use database server ideal for small and medium sized applications. It is a client server implementation that consists of a server daemon mysqld and many different client programs. It is available on a variety of UNIX platforms Windows NT and Windows 95 98. On UNIX platforms it uses threading which makes it a high performance and highly scalable database server. The main features of a MySQL database server are described below. Standards Supported MySQL supports entry-level ANSI SQL92 and ODBC level 0-2 SQL standard. Language Support The database server mysqld can issue error messages in Czech Dutch English Estonian French German Hungarian Italian Norwegian Nynorsk Polish Portuguese Spanish and Swedish. MySQL by default uses the ISO-8859-1 Latin1 character set for data and sorting. The character set used for data and sorting can be changed .
