Created
October 18, 2015 06:28
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A function to redirect uppercase URLs to lowercase.
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| /** | |
| * Changes the requested URL to lowercase. | |
| * | |
| * Only if URL does not include a filename or query variable. | |
| */ | |
| function force_lowercase_urls() { | |
| // Grab requested URL | |
| $url = $_SERVER['REQUEST_URI']; | |
| // If URL contains a period, halt (likely contains a filename and filenames are case specific) | |
| if ( preg_match('/[\.]/', $url) ) { | |
| return; | |
| } | |
| // If URL contains a question mark, halt (likely contains a query variable) | |
| if ( preg_match('/[\?]/', $url) ) { | |
| return; | |
| } | |
| if ( preg_match('/[A-Z]/', $url) ) { | |
| // Convert URL to lowercase | |
| $lc_url = strtolower($url); | |
| // 301 redirect to new lowercase URL | |
| header('Location: ' . $lc_url, TRUE, 301); | |
| exit(); | |
| } | |
| } |
@SinnlosS no good reason, this is just an old gist I created 5 years ago and probably didn't spend much time slapping together 😄
I have a free plugin in the WP marketplace with this same functionality and I may have resolved the issue there but I can't recall:
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I've tried your solution, and in general it works fine. Only reason why I don't use it is that if the URL has a query string the base URL without the query string is not set to lowercase. In this form it's pitily not suitable for my demands.
Is there a reason you're not using SCRIPT_URI and QUERY_STRING from $_SERVER?
I now set up a short script on my own to fit my needs, so far it works fine for me:
if( !empty($_SERVER['SCRIPT_URI']) && $_SERVER['SCRIPT_URI'] !== strtolower($_SERVER['SCRIPT_URI']) ) { $redirect = strtolower($_SERVER['SCRIPT_URI']); if(!empty($_SERVER['QUERY_STRING'])) { $redirect.= "?".$_SERVER['QUERY_STRING']; } header('Location: ' . $redirect, TRUE, 301); exit(); }