Be careful when reading health books; you may die of a misprint.
Reckoners without their host must reckon twice.
There was a door to which I found no key; There was the veil through which I might not see.
In this chapter you will:
• Manipulate data of various types.
• Use operators, arrays and control statements.
• Use regular expressions to search for text that matches a patterns.
• Construct programs that process form data.
• Store data on the client using cookies.
• Create programs that interact with MySQL databases.