>
(annotation) <#2 The result key in the returned array is used for error reporting.>
(annotation) <#3 Turn off the view renderer.>
Encoding to JSON is taken care of by the Zend_Json component. There are two static functions, encode()
and decode() available that will use the PHP JSON extension if available, otherwise will use a PHP
implementation. Obviously, the PHP JSON extension is faster, but it is useful to know that the class will work
even if it isn??™t available.
The rest of the code in feedbackAction() is standard Zend_Framework code that updates the counts of the
database fields helpful_yes and helpful_total within the reviews table for the particular view in question. In this
case, we construct the SQL directly and execute it using the query() function of the Zend_Db object. Note
that as we use the review id from the user within the SQL directly, the cast to an integer is vital to ensure that
we don??™t accidentally introduce an SQL injection vulnerability.
4.6 Summary
Within this chapter we have looked at what Ajax is and where it fits within a Zend_Framework application.
While it is possible to hand craft all the Ajax code required, it is easier to use one of the many libraries
Licensed to Menshu You
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