PHP 5 in Practice

1. Strings By far, most problems a developer encounters involve the manipulation of strings. Especially when used in a web environment, nearly all input and output to a PHP script are simply strings. It is no surprise t-This chapter is deleted....

2. Numbers Being a general-purpose language, PHP has the basic set of mathematical operators and a basic set of mathematical functions. A full list can be found at http://php.net/math. Though it is beyond of the scope o -This chapter is deleted....

3. Time and Date Applications that deal with time are forever present, especially in web-based applications: times of form submittals, user input such as date of birth, and the updating and removal of pages when out of -This chapter is deleted....

4. Variables PHP provides the basic variable types: Boolean, integer, floating point, and strings. Strings and the number types were covered in Chapter 1, quot;Strings,quot; and Chapter 2, quot;Numbers.quot; In addition-This chapter is deleted....

5. Arrays Arrays are a necessary part of any computer language. However, in PHP, arrays are especially versatile. In most languages, arrays are implemented simply as many-dimensional tables; each element is accessed by -This chapter is deleted....

6. Functions Functions in PHP are generally like functions in most other programming languages: They identify blocks of code that can be referenced over and over again. Hence, PHP functions have many of the same charact...

7. Classes and Objects Before delving into object-oriented programming in PHP, you must first note that PHP 5 has seen a complete rewrite of its object-oriented capabilities. Because a full discussion of object-oriented...

8. Files and Directories As is necessary for any language, PHP has a complete set of file and directory support functions. However, one feature that makes these functions particularly useful in a web environment is the -This chapter is deleted....

9. Web Page Creation/XHTML/CSS This chapter may seem a bit odd considering that nearly every example in this book uses PHP to create a web page. However, the focus has been on other aspects of the language. This chapter-This chapter is deleted....

10. Web Form Handling As started in Chapter 9, quot;Web Page Creation/XHTML/CSS,quot; this chapter continues to demonstrate PHP's capabilities when used in the web server-side environment. The first section demonstrates-This chapter is deleted....

11. Data Validation and Standardization With any type of general user input, such as that retrieved through form submissions, the programmer must always expect the worse, even if you do not consider malicious intent. He-This chapter is deleted....

12. Sessions and User Tracking Just as with form data input and handling, PHP provides an excellent and seamless interface to the common methods of tracking user sessions. This chapter starts with a description of cooki-This chapter is deleted....

13. Web Services and Other Protocols Because PHP is so closely associated with web development and information delivery, interfaces have been developed that allow PHP to access many more Internet protocols than just HTT-This chapter is deleted....

14. Relational Databases In web environments, databases are as ubiquitous as blades of grass in a meadow. Web applications such as photo archives, blogs, podcasts, forums, retail sites, and portals are all driven by dat...

15. Other Data Storage Methods For large, interrelated datasets that need to be accessible by many different sources, databases are a fine solution. However, more often than not, applications only use information that i-This chapter is deleted....

16. Email Email is the quot;killer appquot; of the Internet (though some may claim it is WWW). Amazing numbers of email messages get sent across the Internet every day. Inevitably, you will need to write code that deals-This chapter is deleted....

17. XML It's all you hear about these days: XMLExtensible Markup Language. In oversimplified terms, XML is basically a syntax that allows for the exchange of textual information between applications. The information is -This chapter is deleted....

18. Images Due to its close association with web page generation, an extensive set of libraries has been incorporated into PHP to create and manipulate images. The core set of routines is based on the GD library. Becaus-This chapter is deleted....

19. Error Reporting and Debugging PHP comes with a well-rounded set of functions to manage error reporting and debugging information. As you might expect, such functionality is highly valued during script development. H-This chapter is deleted....

20. User Authentication and Encryption Invariably in a web environment, the need will arise to restrict access to an area of a website. Almost hand-in-hand, you will need to secure data either to store in a database or -This chapter is deleted....