The wordpress importer / exporter should work for this task (maintaining post dates and comments), but it’s better to test it before deleting the online blog. My advice is to create first a fresh install in a folder (so you’ll can temporary reach your new installation at www.yoursite/folder/ ) and test if everything works fine … Read more
I don’t see any issue with the uninstall besides the fact that echo a string(this interpreted us failed) and using hardcode prefix. Below code have been tested locally with the latest version of WordPress. // Access the database via SQL global $wpdb; $wpdb->query( “DELETE FROM {$wpdb->prefix}posts WHERE post_type=”acme_product”” ); $wpdb->query( “DELETE FROM {$wpdb->prefix}postmeta WHERE post_id … Read more
How to remove traces from widget during uninstallation
You could move the files to a non-web-accessible directory and change the password on the database user. eg, if your site’s root directory is /var/www/html, you could create a directory elswhere on the server (say /home/me/site-archive) and move the files from /var/www/html into /home/me/site-archive. If you ever want to re-activate the site, you can move … Read more
I just came across this in a search and thought I’d reply just in case you didn’t figure this out. I’m not 100% sure the best way to go about this but I can provide some information that may be helpful. $wpdb has both prefix and base_prefix members, so you can get the ‘wp_4_’ by … Read more
I have seen a couple of Plugins which is using functions defined in their Plugin file inside the uninstall.php file. That doesn’t work, if the uninstall.php calls one of the plugin’s functions, it will produce a Fatal error: Call to undefined function. Unless… (explained bellow). This, on the other hand, works: <?php /* Plugin Name: … Read more
There are different approaches to this, depending on specific requirements. For example in your case you seem more worried about plugin picking up ghost data than that data being left behind. Such case might be easier handled by generating unique key prefix to use and just flushing that on uninstall. No prefix = no data … Read more
If you just want to delete Yoast SEO manually so you need to login into your server and delete the following folder: …/wp-content/plugins/wordpress-seo So you will delete the directory wordpress-seo. If I were you I’d do it via SSH as Yoast SEO has approximately 600 files.
WordPress uses two methods to unistall plugin: uninstall.php file in plugin’s root folder. If file exists, it is executed and second method is not used. A function registered by plugin via register_uninstall_hook(). You should search it in plugin’s php files.
They’re just two different ways of doing the same thing. It’s up to you which one to use, or whether to use both. Neither is ‘correct’. Use whichever makes more sense to you with the structure of your plugin.