Allowing periods in wordpress permalinks
John Resig tweeted the following:
Trying to get periods in Wordpress permalinks to work, but failing. How can I force WP to allow: http://example.com/foo.bar/
I was curious so I watched replies to him. There were many deeply misguided answers, my favorite being:
I’m not sure, but it seems like it might likely be a server configuration issue.
There was a reference to this: http://firsttube.com/read/hacking-wordpress-day-two/, but hacking the core is a pretty poor solution, and will be overwritten the next time you upgrade.
The periods get dropped by sanitize_title_with_dashes, and there is no clean way to hook into it and fix the problem, so you can just use remove_filter to drop it, and replace it with a very similar function that allows for periods:
remove_filter('sanitize_title', 'sanitize_title_with_dashes'); add_filter('sanitize_title', 'sanitize_title_with_dashes_allow_periods'); function sanitize_title_with_dashes_allow_periods($title){ // same as sanitize_title_with_dashes minus the line replacing periods, // and an alteration to the final catch all regex to allow periods // please note, might be dangerous for some reason? i don't rightly know. $title = strip_tags($title); // Preserve escaped octets. $title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title); // Remove percent signs that are not part of an octet. $title = str_replace('%', '', $title); // Restore octets. $title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title); $title = remove_accents($title); if (seems_utf8($title)) { if (function_exists('mb_strtolower')) { $title = mb_strtolower($title, 'UTF-8'); } $title = utf8_uri_encode($title, 200); } $title = strtolower($title); $title = preg_replace('/&.+?;/', '', $title); // kill entities //$title = str_replace('.', '-', $title); $title = preg_replace('/[^\.%a-z0-9 _-]/', '', $title); // allow for periods $title = preg_replace('/\s+/', '-', $title); $title = preg_replace('|-+|', '-', $title); $title = trim($title, '-'); return $title; }








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bonus!
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