Conventions Used in This Book (Programming PHP)

0.3. Conventions Used in This Book

The following typographic conventions are used in this book:

Italic: Used for file and directory names, email addresses, and URLs, as well as for new terms where they are defined.
Constant Width: Used for code listings and for keywords, variables, functions, command options, parameters, class names, and HTML tags where they appear in the text.
Constant Width Bold: Used to mark lines of output in code listings.
Constant Width Italic: Used as a general placeholder to indicate items that should be replaced by actual values in your own programs.