I recently came across a strange problem with the fetch_feed function in WordPress not working with URLs containing the & symbol. The URL was being passed to fetch_feed via a shortcode parameter, but fetch_feed couldn’t find the feed.
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Clearing The Cache When A Widget Is Saved
WP Super Cache has a setting which allows the cache to be cleared when a post is saved. I needed to clear the cache when a widget is saved. It turned out to be surprisingly easy.
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