In this third part of a seven-part series on the Iterator, Countable and ArrayAccess SPL interfaces, I give the MySQLi_ResultWrapper class developed in the previous part the capability of counting the number of rows contained in a given result set. I'll do that by implementing the count() method declared by the Countable interface. Doing this will make it possible to use an instance of the class to traverse data sets and count records as if they were plain PHP arrays, which is quite appealing to client code that works with the classs API.
- As you possibly know, the Standard PHP Library (also know simply by its acronym, SPL) is comprised of a powerful set of functions, classes and interfaces that permit developers to address problems that occur frequently during the development of web programs. Ranging from autoloading classes on deman...
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Implementing the Countable SPL Interface
Posted: March 30th, 2010, 7:00am MDT