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GlobIterator: Easy access to specific files

Note: This article was originally published at Planet PHP on 21 April 3240.
Planet PHP
For a project I am working on I needed to iterate over all .xml files in a specific directory. I started out with a DirectoryIterator, then considered I didn't want the XML filtering to take place inside my foreach loop. I decided to add a FilterIterator to the setup, but then felt this was not the right solution either. So I turned to my favorite SPL guru, Joshua Thijssen, to see if I was overseeing some kind of filter-option in the DirectoryIterator. I didn't, but I did oversee something else: GlobIterator.