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You can use a simple SQL statement to remove a featured image from all posts, pages and custom post types in WordPress. Simply run this statement against the database:

DELETE FROM wp_postmeta WHERE meta_key = '_thumbnail_id';

Please create a backup before running this statement – if anythi...

If you want to disable Gutenberg for your Custom Post Type (in this example, it is CPT my_cpt), you can use this snippet:

add_filter('use_block_editor_for_post_type', 'cdy_disable_gutenberg', 10, 2);
function cdy_disable_gutenberg($current_status, $post_type)
{
    if ($post_type === 'my_cpt')...

If you want to delete all rows from a table but exclude the last X rows (in this case 20), you can use this SQL statement:

DELETE FROM `my_table`
WHERE id NOT IN(
        SELECT
            id FROM (
                SELECT
                    id FROM `table`
                ORDER BY...

What’s the difference between new self() and new static() in PHP? Or is it the same?

It is not the same. self refers the class in which the new keyword is actually written. static refers to the class in the hierarchy, where the method has been called. Look at the following example:

class Class...

In WordPress, you can add pages to the admin backend by using the functions add_menu_page() or add_options_page(). If you use these functions, you may run in an error, that you get:

You do not have sufficient permissions to access this page

Even if you are a Super Administrator. What went...

When restoring a blank Mail-in-a-Box, you may get this error:

Error ‘[Errno 17] File exists’ processing ssl/ssl_certificate.pem

Solution to fix the problem is to run this command before running the restore:

rm -rf /home/user-data/ssl/*

Aft...

If you use WordPress in combination with a Laravel Forge provisioned server, you may encounter problems when WordPress is not installed at the root level.

I discovered especially REST errors (404), when the WordPress installation is contained in a subfolder. To fix that problem, add this to your ng...

If you use Laravel Forge and move some files to another users account (using isolated users), you will have to fix the file and folder permissions.

First step is to set the correct owner. You can do that by running:

sudo chown -R CORRECT_USER FOLDER

Replace CORRECT_USER by the name of th...

This tutorial guides you through the setup process of Sentry (onpremise / self hosted) using Ubuntu 18.04, nginx as webserver and LetsEncrypt certificates.

First step is to get Ubuntu 18.04 up and running. In my case, I use a cloud server from Hetzner. You should u...

max_allowed_packetis a MySQL variable. If you wanto to increase max_allowed_packet, you can use the SQL statement below.

First step is to check the current size of max_allowed_packet:

SHOW VARIABLES LIKE 'max_allowed_packet';

Next step is to set max_allowed_packet – in thi...