1. PHP-language, database- programming Teppo Räisänen Oulu University of Applied Sciences School of Business and Information Management

2. Idea of database programming End users do not use database from management console using SQL-statements Create UI (web-page, windows form, etc.) for end user and permorm database manipulation in application code (e. g. in PHP-script)

3. Database programming Database-driver Database-programming API (Application programming interface) Application

4. Basic steps of database programming 1.Open connection to database-server and Select database 2.Manipulate data 3.Close connection

5. Example: Read data from database

6. mysql_fetch_row Structure of the table in database Data (records) of the table in database mysql_fetch_row read one record at time and the return value is array containing information of all fields

7. Example: Insert data into database save.php newMessage.html

8. Opening connection Connection to database server must be opened before manipulating data Check always for error when opening database connections

9. Select database to use Servers may have several different databases

10. Manipulate data Reading information – mysql_query containing select sql-statement – mysql_fetch_row inside while loop Inserting, updating and deleting – mysql_query containing sql-statement that manipulates data

11. Close connection Connection to database (server) must be always closed after manipulatin data Open connections consumes resources from server