Using Regular Expressions in a PHP Framework

Question

I've got a university project to create a site using a framework given to us by the teacher. I've hosted the site at http://daniel-lucas.com so you can see what's happening.

As you can see the address ends with /?index.

In the configuration file I've just used :

new UrlMapping('^index/$', 'musiconlineapp.listeners.MainListener.handle', 'musiconlineapp/views/MainView.php')

The first parameter is the address to map. The second is the controller for the page and the method to load in the controller (handle). The third is the view to display for the page.

However I'm having trouble displaying categories for the site. I was told to use mapping like this:

new UrlMapping('^category/(?P<cat>\w+)/$', 'musiconlineapp.listeners.CategoryTitleListener.handle', 'musiconlineapp/views/CategoryTitleView.php' )

My problem is that I've not done any regex for a while and can't figure out what address I'm supposed to go to when I click on the link. I've tried /?category&cat=rock and similar variations but none of them work.

Which framework are you using?

hakre
– hakre

2012-01-29 11:30:54 +00:00
Commented Jan 29, 2012 at 11:30 — hakre
– hakre, Commented Jan 29, 2012 at 11:30

Amber · Accepted Answer · 2012-01-29 08:58:58Z

That regex looks like it's supposed to match /?category/rock/ or the like.

^ # beginning of string category/ # literal 'category/' (?P<cat> # named matching group (named 'cat') \w+ # one or more word characters a-zA-Z0-9_ ) # end the named matching group / # literal '/' $ # end of string

Great, thanks. Couldn't figure that one out. What does the ?P do?
(?P<a>b) is how you defined a named matching group that is named a and matches the pattern b

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