Below are useful extensions for the wp-config.php file.
define('WP_HOME','https://ihredomain.de'); //WordPress address (backend) define('WP_SITEURL','https://ihredomain.de'); //Webpage address (home page) define('WP_POST_REVISIONS', 5); //Number of maximum stored revisions define('WP_POST_REVISIONS', false); //Revisions will not be saved define('AUTOSAVE_INTERVAL', 30); //Automatic save every 30 seconds (default 60) define('EMPTY_TRASH_DAYS', 60); //Every 60 days the recycle bin will be emptied define('EMPTY_TRASH_DAYS', 0); //The recycle bin will be emptied immediately define('WP_CACHE', true); //Enable the internal cache of WordPress define('WP_MEMORY_LIMIT', '128M'); //Set the main memory in MByte which is available for WordPress define('WP_MEMORY_LIMIT', '8M'); //Increase upload limit to for example 8, 16, 32, 64, 128 MB define( 'WP_EMOICONS', false ); //Disable emojis define( 'IMAGE_EDIT_OVERWRITE', true ); //Overwrites existing same images define('DISALLOW_FILE_EDIT', TRUE ); //Prevent editing of files in the editor define('FORCE_SSL_LOGIN', true ); //forceSSL login define('AUTOMATIC_UPDATER_DISABLED', true); //Disable automatic updates define( 'WP_AUTO_UPDATE_CORE', false ); //Disable all automatic WordPress updates