I have a bit of an obsession with uploading photos to different services thanks to Instagram. Instagram's iPhone app allows me to take photos and quickly filter them; once photo tinkering is complete, I can upload the photo to Instagram, Twitter, Facebook, and Flickr. This process made me wonder what it would take to upload photos to Flickr using PHP. This post details how you can authenticate and upload photos to Flickr using PHP with phpFlickr.
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