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PHP presentation - Com 585
- 1. .
- 2. • Server Based scripting language • Embedded into HTML • Manages Forms • Interfaces with databases (MySQL, etc) • Creating dynamic pages on the fly
- 3. 1994 - Personal Home Page Tools 1995 - PHP-FI (Form Interpreter) Forms and databases 1997 - PHP 3 (50,000 users) (Hypertext Preprocessor) 1999 – 1,000,000 users 2000 – PHP 4 (OOP & scalable) 3.6 million users Today – PHP5 - Over 20 million Rasmus Lerdorf
- 4. • It’s Free - no licensing restrictions • Crowd sourced – constantly improving (Given enough eyeballs, all bugs are shallow) • Minimalist language – simpler • Easy to learn (especially if know C/C+) • Over 120 libraries and 1,000 functions • Powerful string-parsing capabilities • Embraces object oriented programming • Integrates with over 25 types of databases
- 5. 1) Server receives request via HTTP & retrieves file 2) If .php file, then processed by the PHP engine 3) Script’s application executes, performs database queries 4) PHP engine constructs HTML page with results– sends to browser
- 6. <html> <head> <title>My first PHP Page</title> </head> <body> This is normal HTML code <?php //php code goes here ?> Back into normal HTML </body> </html>
- 7. Establish a connection with the database mysql_connect ( [$server [,$username [, $password]]]) Validate user input as needed (verify user ID, etc.) Select the database on the server to use mysql_select_db ($database [, $link]); Execute the desired query against the database mysql_query($query [, $link]); Retrieve and process the results mysql_fetch_row ($result); (this function would return a single row from the result set) Create HTML or perform actions based upon the results Close the database connection (optional)
- 8. Scripts are a series of PHP Statements, each of which performs an action Save your PHP script with the .php extension
- 9. .
Hinweis der Redaktion
- PHP-FI included ability to integrate forms with databases. PHP 4 included better resource-handling which made it scalable for large scale applications. Also included support for object-oriented programming. PHP 5 improved on support for OOP and added many more features.