1. Development of Web Applications - Introduction Teppo Räisänen Principal Lecturer Oulu University of Applied Sciences School of Business and Information Management teppo.raisanen@oamk.fi, 050 382 6587

2. Contents How Internet and web-applications work Static and dynamic web pages HTML-forms HTTP (HyperText Transfer Protocol) Introduction to PHP

3. Client-Server model InternetServer (e. g. oamk.fi) HTTP-request (X)HTML presented by the browser (X)HTML processed by the server HTTP-reply Browser

4. (X)HTML Hypertext Markup –language Is used to implement user-interface You write tags and the browser knows how to interpret them HTML-language (original) spesification can be found from http://www.w3.org/MarkUphttp://www.w3.org/MarkUp Example of static HTML-page (Ilmari)

5. (X)HTML-forms TextFields Lists Buttons Etc. Nested into form Form can be submitted to server Example

6. Protocols HTTP Hypertext Transfer Protocol FTP File Transfer Protocol SMTP Simple Message Transfer Protocol POP Post Office Protocol IMAP Internet Message Access Protocol...

7. HTTP Hypertext Transfer protocol The way browser and web-server are talking to each other Browser requests the service and server answers to that Connection is closed after server reply Understanding HTTP on http://www.perlfect.com/articles/http.shtml http://www.perlfect.com/articles/http.shtml Tool for viewing HTTP-traffic http://web-sniffer.net/ http://web-sniffer.net/

8. PHP PHP Hypertext Preprocessor PHP is one of the web-server techologies PHP-language has features from C and Perl – languages (but is also looks like Java, because Java is also founded from C/C++)

9. PHP Script is written between: – -tags – <? print ”This is an example!”; ?>