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2.4. References
• For more in depth information see the php.net11 documentation.
• There are a plethora of books on PHP. A good book from O'Reilly is Learning PHP12. PHP Cook Book13 is also good, but has no yet been updated for PHP7.
• Also, see the Apache MySQL PHP Ubuntu Wiki14 page for more information.
11 http://www.php.net/docs.php
12 http://oreilly.com/catalog/0636920043034/
13 http://oreilly.com/catalog/9781565926813/
14 https://help.ubuntu.com/community/ApacheMySQLPHP