Conventions

The following typographic conventions are used in this book:

Italic

is used for filenames, directories, command names, module names, function calls, command-line switches, and Apache file directives. It is also used for email addresses and URLs.

Constant Width

is used for code examples. It is also used for constants and data structures.

Constant Width Bold 

is used to mark user input in examples.

Constant Width Italic

is used to mark replaceables in examples.

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