PHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide (4th Edition)
Format: PDF / Kindle (mobi) / ePub
It hasn't taken Web developers long to discover that when it comes to creating dynamic, database-driven Web sites, MySQL and PHP provide a winning open-source combination. Add this book to the mix, and there's no limit to the powerful, interactive Web sites that developers can create. With step-by-step instructions, complete scripts, and expert tips to guide readers, veteran author and database designer Larry Ullman gets right down to business: After grounding readers with separate discussions of first the scripting language (PHP) and then the database program (MySQL), he goes on to cover security, sessions and cookies, and using additional Web tools, with several sections devoted to creating sample applications. This guide is indispensable for beginning to intermediate level Web designers who want to replace their static sites with something dynamic. In this edition, the bulk of the new material covers the latest features and techniques with PHP and MySQL. Also new to this edition are chapters introducing jQuery and object-oriented programming techniques.
place, there will be an SQL syntax error. If you typecast such variables to an integer or float first, the query may not work (in terms of returning a record) but will still be syntactically valid. You’ll frequently see this in the book’s last three chapters. * * * * * * Tip As I implied, regular expressions are a more advanced method of data validation and are sometimes your best bet. But using type-based validation, when feasible, will certainly be faster (in terms of processor
'Larry'; $that = 234; $stmt->execute( ); The MySQLi::prepare( ) method returns an object of type MySQLi_STMT. That object has a few key properties: • affected_rows stores how many rows were affected by the statement, normally applicable to INSERT, UPDATE, and DELETE queries. • num_rows reflects the number of records in the result set for a SELECT query. • insert_id stores the automatically generated ID value for the previous INSERT query. • error represents any error that might have
specify the password on this line if you prefer—by typing it directly after the -p prompt—but it will be visible, which is insecure. The -h hostname argument is optional, and you can leave it off unless you cannot connect to the MySQL server without it. Within the mysql client, every statement (SQL command) needs to be terminated by a semicolon. These semicolons are an indication to the client that the query is complete and should be run. The semicolons are not part of the SQL itself (this is a
NOT NULL, email VARCHAR(40) NOT NULL, pass CHAR(40) NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (user_id) ); The last thing you should know about indexes are the implications of indexing multiple columns. If you add an index on col1, col2, and col3 (in that order), this effectively creates an index for uses of col1, col1 and col2 together, or on all three columns together. It does not provide an index for referencing just col2 or col3 or those two together. To create
returns the decrypted PIN for the customer with a customer_id of 1. Any value stored using AES_ENCRYPT( ) can be retrieved (and matched) using AES_DECRYPT( ), as long as the same salt is used. 5. Check out the customer’s record without using decryption : SELECT * FROM customers WHERE customer_id=1; Encrypted data is stored in an unreadable format (here, as a binary string of data). As you can see in the figure, the encrypted version of the PIN is unreadable. * * * Tip As a rule of