RE: [PHP] observer pattern

> -----Original Message----- > From: Eric Butera [mailto:eric.butera@gmail.com] > Sent: Friday, May 20, 2011 2:25 PM > To: PHP > Subject: Re: [PHP] observer pattern > > [whoops didn't hit reply-all] > > On Wed, May 18, 2011 at 5:18 AM, Ken Guest <ken@linux.ie> wrote: > > Lo, > > > > so, I'm wondering - how many of you use the observer pattern in php; > > and if so, do you implement it 'standalone' or with the spl classes? > > Is there any particular advantage to doing it "your way"; whichever > > your way is? > > > > Ken > > > > -- > > http://blogs.linux.ie/kenguest/ > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > I use it quite a bit over the various projects I maintain. It allows > subjects to trigger events that observers can process if they're > interested, or better yet, completely ignore. This allows > standardized code bases to create nice hooks that allow extensibility > without needing to place one-off code inside the main project. > > A quick example might be on saving a record in your code, it triggers > an event, then an observer in a custom site watches for said event and > injects/updates a search entry in Lucene. This way one site can have > a custom search engine that another site might not need. > > I started off with the concepts I found in > http://examples.stubbles.net/docroot/events/ but created my own > because I wanted something stand-alone. Well, you (or in this case, *I*) learn something new every day. I had no idea PHP could do observers. How very "Java" (and neat!) Granted, it is just a design pattern, but to have the SplObserver stuff built in is pretty cool. What version of PHP is this available from? The web page doesn't say. http://www.labelmedia.co.uk/blog/posts/php-design-patterns-observer-pattern.html http://cormacscode.wordpress.com/2010/10/12/practical-example-php-implementation-of-the-observer-pattern/ http://www.php.net/manual/en/book.spl.php