WordPress.org

Important Note

This filter can only check future syndication posts. Whatever duplicates are already present in your WordPress installation you'll have to remove/clean-up on your own.

Changelog

1.2 - Escaping the single quote (') character sometimes gives a conversion of ’ instead of ’ This caused a false negative and duplicate posts would be stored. Consider this release a temporary hack until I write a proper regex based title escape function. 1.1 - Characters in post-titles like '&' were not getting converted to HTML entities. This caused the post title comparison to register a false negative. (So duplicate posts would be added to your feed.)

1.0 - initial release

License

Copyright (C) 2008 by Mark R. Allen All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
• Neither the name of Mark Allen nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.