Databases on the Web with PHP
Interfacing a Database to the Web
Classical “client/server” architecture:
- server program waits for requests
- clients request connections
- once the connection is established, the client can send queries/transactions to the server
- server processes queries and transactions and returns results to respective clients
A dynamic webpage is a page that interacts with the user, so that each user visiting the page
sees customized information.
Dynamic Web applications are prevalent in e-commerce sites and search engines, where the
content displayed is generated from information accessed in a database or other external
source.
Popular technologies and standards for building database-enabled applications:
…
PHP (Hypertext Preprocessor) is an open-source server-side, HTML-embedded, crossplatform scripting language (freely downloadable from www.php.net)
General idea:
- Provides a way to put instructions in HTML code to create dynamic content
- PHP instructions are read and parsed by the web server (not by the browser that is displaying the page!)
- The web server replaces PHP code with the content generated by that code
- Provides a wide variety of functions that support everything from array manipulation to regular expressions
…
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