The SPL has many other iterators and other interfaces available for more complicated requirements;
however they are not, yet at least, used by the Zend Framework.
Licensed to Menshu You
Zend Framework in Action (Ch01) Manning Publications Co. 58
17.3 PHP4
By now, everyone should be using PHP 5 as it is over three years old and PHP4 will be unsupported after
August 2008. If your first steps into PHP 5 are with the Zend Framework then you really should read the
excellent migration guide available on the PHP website at http://www.php.net/manual/en/migration5.php.
17.4 Software design patterns
After producing software for a while you soon discover that you encounter similar problems to ones you have
encountered in the past. As a result, you probably solved them with similar approaches. It turns out that this
happens across the whole gamut of software development and there tends to be a best practice solution to
certain classes of problems that appear regularly. In order to make it easier to discuss these approaches to
solving problems, the term design pattern has been coined and catalogues of design patterns are available to
help you solve software design problems.
The key thing to understand about design patterns is that they are not about the code and they are all about
guidelines on how to solve the problem.
Pages:
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379