The function DB::isError will check to see whether the result that's been returned to you is an error or not. If it is an error, you can use DB::errorMessage to return a text description of the error that was generated. You need to pass DB::errorMessage the return value from your function as an argument.
Here you rewrite the PEAR code to use error checking:
Now that you have a good handle on connecting to the database and the various functions of PEAR, we're going to talk about forms. Forms provide a way to send substantial data from the user to the server where it can be processed.
Chapter 9 Questions
Question 9-1. Create a PEAR-style connect string to connect to this database:
database name: survey
Question 9-2. Using the parameters in Question 9-1, write the non-PEAR PHP code to connect to a database and select the instance.
Question 9-3. Using the connection from Question 9-2, write the non-PEAR PHP code to fetch and display the results of the query select * from authors;.
Question 9-4. What are the advantages of using PEAR?
See the Appendix for the answers to these questions.