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Development of Web Applications - Introduction
Jouni Juntunen Seniour Lecturer Oulu University of Applied Sciences School of Business and Information Management
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Contents How Internet and web-applications work
Static and dynamic web pages HTML-forms HTTP (HyperText Transfer Protocol) Introduction to PHP
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Client-Server model Internet Server (e. g. oamk.fi) Browser
HTTP-request HTTP-reply (X)HTML processed by the server (X)HTML presented by the browser
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(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 Example of static HTML-page (Ilmari)
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(X)HTML-forms TextFields Lists Buttons Etc. Nested into form
Form can be submitted to server Example
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Protocols HTTP Hypertext Transfer Protocol FTP File Transfer Protocol
SMTP Simple Message Transfer Protocol POP Post Office Protocol IMAP Internet Message Access Protocol ...
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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 Tool for viewing HTTP-traffic
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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++)
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PHP Script is written between: <? ?> -tags <php? ?> -tags
<script language=”php”> </script> <html> <head><title></title></head> <body> <? print ”This is an example!”; ?> </body> </html>
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