A regular expression for removing and (case insensitive) between HTML elements if there is no content between the HTML elements. It was written for fixing extra line spaces created in a WordPress visual editor after the content of the visual editor was returned from the PHP nl2br() method.
- $output = preg_replace('/<(((?!br)[^>])*)>\r*\n*\s*(<br\s?\/?>)*\r*\n*\s*<(((?!br)[^>])*)>/i', '<$1><$4>', $output);
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