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| Connecting PHP with MySQL | |
First, we're going to talk about PHP's built-in database jobs. We'll also demonstrate you how to use the PEAR database functions that give the capability to use the same functions to contact any supported database. That flexibility comes from a procedure called abstraction. Abstraction includes details which you need to log into a database that is placed into a normal format. This standard format permits you to interact with MySQL as well as other databases using the same format. In the same way, MySQL-specific functions are replaced with general ones that know how to talk to many databases. The Process The basic steps of executing a query, when you are using the mysql command-line tool or PHP, are the same: • Attach to the database. • Choose the database to use. • Construct a SELECT statement. • Execute the query. • Display the results. Resources While you are connecting to a MySQL database, you will use two latest resources. The first is the link identifier that holds all of the information essential to attach to the database for an active connection. The other resource is called the results resource which includes all information required to get back results from an active database query's result set. You'll be generating and conveying both resources in this chapter.
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