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phpFlickr Class 3.0 Written by Dan Coulter (dancoulter@users.sourceforge.net) Project Homepage: http://www.phpflickr.com/ Google Code Project Page: http://code.google.com/p/phpflickr/ Released under GNU Lesser General Public License (http://www.gnu.org/copyleft/lgpl.html) For more information about the class and upcoming tools and applications using it, visit http://www.phpflickr.com/ or http://code.google.com/p/phpflickr/ If you are interested in hiring me for a project (involving phpFlickr or not), feel free to email me. Installation instructions: 1. Copy the files from the installation package into a folder on your server. They need to be readible by your web server. You can put them into an include folder defined in your php.ini file, if you like, though it's not required. 2. All you have to do now is include the file in your PHP scripts and create an instance. For example: $f = new phpFlickr(); The constructor has three arguments: A. $api_key - This is the API key given to you by flickr.com. This argument is required and you can get an API Key at: http://www.flickr.com/services/api/key.gne B. $secret - The "secret" is optional because is not required to make unauthenticated calls, but is absolutely required for the new authentication API (see Authentication section below). You will get one assigned alongside your api key. C. $die_on_error - This takes a boolean value and determines whether the class will die (aka cease operation) if the API returns an error statement. It defaults to false. Every method will return false if the API returns an error. You can access error messages using the getErrorCode() and getErrorMsg() methods. 3. All of the API methods have been implemented in my class. You can see a full list and documentation here: http://www.flickr.com/services/api/ To call a method, remove the "flickr." part of the name and replace any periods with underscores. For example, instead of flickr.photos.search, you would call $f->photos_search() or instead of flickr.photos.licenses.getInfo, you would call $f->photos_licenses_getInfo() (yes, it is case sensitive). All functions have their arguments implemented in the list order on their documentation page (a link to which is included with each method in the phpFlickr clasS). The only exceptions to this are photos_search(), photos_getWithoutGeodata() and photos_getWithoutGeodata() which have so many optional arguments that it's easier for everyone if you just have to pass an associative array of arguments. See the comment in the photos_search() definition in phpFlickr.php for more information. Authentication: As of this release of the phpFlickr class there is only one authentication method available to the API. This method is somewhat complex, but is far more secure and allows your users to feel a little safer authenticating to your application. You'll no longer have to ask for their username and password. Authentication API - http://www.flickr.com/services/api/auth.spec.html I know how complicated this API looks at first glance, so I've tried to make this as transparent to the coding process. I'll go through the steps you'll need to use this. Both the auth.php and getToken.php file will need your API Key and Secret entered before you can use them. To have end users authenticate their accounts: First, setup a callback script. I've included a callback script that is pretty flexible. You'll find it in the package entitled "auth.php". You'll need to go to flickr and point your api key to this file as the callback script. Once you've done this, on any page that you want to require the end user end user to authenticate their flickr account to your app, just call the phpFlickr::auth() function with whatever permission you need to use. For example: $f->auth("write"); The three permissions are "read", "write" and "delete". The function defaults to "read", if you leave it blank. Calling this function will send the user's browser to Flickr's page to authenticate to your app. Once they have logged in, it will bounce them back to your callback script which will redirect back to the original page that you called the auth() function from after setting a session variable to save their authentication token. If that session variable exists, calling the auth() function will return the permissions that the user granted your app on the Flickr page instead of redirecting to an external page. To authenticate the app to your account to show your private pictures (for example) This method will allow you to have the app authenticate to one specific account, no matter who views your website. This is useful to display private photos or photosets (among other things). *Note*: The method below is a little hard to understand, so I've setup a tool to help you through this: http://www.phpflickr.com/tools/auth/. First, you'll have to setup a callback script with Flickr. Once you've done that, edit line 12 of the included getToken.php file to reflect which permissions you'll need for the app. Then browse to the page. Once you've authorized the app with Flickr, it'll send you back to that page which will give you a token which will look something like this: 1234-567890abcdef1234 Go to the file where you are creating an instance of phpFlickr (I suggest an include file) and after you've created it set the token to use: $f->setToken("<token string>"); This token never expires, so you don't have to worry about having to login periodically. Using Caching: Caching can be very important to a project. Just a few calls to the Flickr API can take long enough to bore your average web user (depending on the calls you are making). I've built in caching that will access either a database or files in your filesystem. To enable caching, use the phpFlickr::enableCache() function. This function requires at least two arguments. The first will be the type of cache you're using (either "db" or "fs") 1. If you're using database caching, you'll need to supply a PEAR::DB connection string. For example: $flickr->enableCache("db", "mysql://user:password@server/database"); The third (optional) argument is expiration of the cache in seconds (defaults to 600). The fourth (optional) argument is the table where you want to store the cache. This defaults to flickr_cache and will attempt to create the table if it does not already exist. 2. If you're using filesystem caching, you'll need to supply a folder where the web server has write access. For example: $flickr->enableCache("fs", "/var/www/phpFlickrCache"); The third (optional) argument is, the same as in the Database caching, an expiration in seconds for the cache. Note: filesystem caching will probably be slower than database caching. I haven't done any tests of this, but if you get large amounts of calls, the process of cleaning out old calls may get hard on your server. You may not want to allow the world to view the files that are created during caching.