gerobe

I just tried to do the update manually by deactivating the plugin and uploading and overwriting the old files with the new ones.

But unfortunately after activating the plugin – all pages are white again.

Hello!

For those who also want to migrate from YOURLS to Twitter to WP to Twitter here is the way I did it.

Entering the code Joe Dolson suggested won’t work perfectly, because afterwards you will have two shortlink entries in the head section, because WP does enter the post-id as shortlink like www.domain.com/index.php?p=1234. So we have to use a filter to change that link into “our” YOURLS shortlink.

So here is the trick:

First of all install and enable WP to Twitter and deactivate and delete YOURLS to Twitter.

Go to your phpMyAdmin installation, make a backup of the database first(!) and change the existing variable name from YOURLS to Twitter that stores the shortlink into the new one from WP to Twitter by entering the following SQL-Code. Change the wp prefix of wp_postmeta into your own prefix if necessary.

UPDATE 'wp_postmeta' SET 'meta_key' = '_wp_jd_yourls' WHERE 'meta_key' = 'yourls_shorturl'

Now enter the following code in the functions.php of your WordPress theme.

add_filter('pre_get_shortlink', 'gb_my_custom_shortlink', 10, 4);
function gb_my_custom_shortlink($false, $post_id, $context, $allow_slugs) {
	if ( (is_single() || is_page()) && !is_home() ) {
	global $post;
	$short_link = get_post_meta($post->ID, '_wp_jd_yourls', true);
	if('' == $short_link) return false;
}
	return $short_link;
}

This code will look if the post has a shortlink stored and replace the WP default shortlink with the correct YOURLS created link.