PHP: Introduction for Beginners

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About this class

PHP is a scripting language used to create dynamic, complex and robust Web pages. It is free and available for Web servers on many platforms, including UNIX/Linux, Windows and Macintosh. PHP is employed on millions of Web sites around the world and has quickly gained a large user base, ranging from small companies to government organisations.

This course provides a solid foundation in the PHP Web scripting language. Extensive hands-on exercises allow you to produce dynamic Web pages using database content.

Who will the lesson benefit?

This course is valuable for those creating dynamic, database-driven Web sites. Basic experience with HTML is assumed. Programming experience in a language such as ASP, Perl, JavaScript or VB, is helpful.

What delegates will learn

• Write effective, efficient PHP scripts
• Embed PHP scripts in HTML pages to create dynamic Web pages
• Manipulate data from Web page forms
• Track users as they navigate your site with cookies and other PHP features
• Structure PHP code using user-defined functions and external libraries
• Develop database-enabled Web applications using MySQL

Contents of this class

Programming with PHP

PHP language building blocks

• Comparing PHP with other Web scripting languages
• Investigating PHP data types
• Integers
• Floating point values
• Strings
• Booleans

Writing PHP scripts

• Storing values in scalar variables
• Employing ordinary and associative arrays
• Writing conditional expressions
• Implementing loops such aswhile,forandforeach
• Building complete scripts incorporating loops and conditional expressions

Writing Web Pages with PHP

Interacting with the server

• Outlining Web protocols
• Embedding PHP code into HTML pages
• Determining how data is sent from forms to PHP scripts
• Creating dynamically-generated hyperlinks to call PHP scripts

Manipulating user input

• Retrieving form data with$_POSTand$_GETarrays
• Validating retrieved data
• Strategies for handling invalid input
• Storing state information using cookies

Applying Advanced Scripting Techniques

Exploiting the built-in functionality of PHP

• Formatting date and time information
• Manipulating string data
• Reading and writing data using file I/O functions
• Investigating other built-in features

Structuring PHP code

• Writing user-defined functions to structure your code
• Passing arguments and default values to functions
• Returning data from functions
• Accessing global variables
• Building code libraries for reusability
• Incorporating external PHP scripts withrequireandrequire_once

Building Complete Web Applications

Managing errors and problematic situations

• Investigating the HTTP header
• Suppressing on-screen error messages
• Troubleshooting problems when manipulating data
• Redirecting the browser to other pages
• Modifying the PHP configuration file to suit your needs
• Developing debugging strategies

Establishing database connectivity

• Creating and managing database connections
• Sending queries to the database server employing the most efficient methods
• Retrieving and displaying query results
• Avoiding potential problems by managing quotes and backslashes in data
• Closing the database connection

PHP: Introduction for Beginners / 519

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