PHP can work with different types of data. In this chapter, you'll learn about individual values such as numbers and single pieces of text. You'll learn how to put text and numbers in your programs, as well as some of the limitations the PHP interpreter puts on those values and some common tricks for manipulating them.
Most PHP programs spend a lot of time handling text because they spend a lot of time generating HTML and working with information in a database. HTML is just a specially formatted kind of text, and information in a database, such as a username, a product description, or an address is a piece of text, too. Slicing and dicing text easily means you can build dynamic web pages easily.
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