Purpose of this blog

 The purpose of this blog is to record common tricks/tips for managing wordpress.

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forcing deactivating of plugins via mysql

 In the WordPress database, you find there's a table called wp_options inside that table is an option called active_plugins . You can see it by typing: mysql> describe wp_options; This will show the following structure: +--------------+-----------------+------+-----+---------+----------------+ | Field        | Type            | Null | Key | Default | Extra          | +--------------+-----------------+------+-----+---------+----------------+ | option_id    | bigint unsigned | NO   | PRI | NULL    | auto_increment | | option_name  | varchar(191)    | NO   | UNI |         |                | | option_value | longtext        | NO   |     | NULL    |                | | autoload     | varchar(20)     | NO   | MUL | yes     |                | +--------------+-----------------+------+-----+---------+----------------+ The relevant option is called active_plugins , so to see its content, type: mysql> select * from wp_options where option_name = "active_plugins"; This will retu
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turning on debug mode

Turn debug mode on edit your wp-config.php file and find define('WP_DEBUG', false); change to define('WP_DEBUG', true); General causes of bugs 1. Dodgy plugins/templates. Remove them all and add them back one at a time. Same for themes 2. Config errors. Replace the config.php file with the template and reinstate it. Obviously copy/paste the login details for the database out before you do that, so when you recreate it, it asks for them again. 3. Code incompatibilities . You have some old code somewhere (e.g. an old php file) which was not upgraded and is now incompatible with the new php in the new issue of wordpress/plugin/template etc 4. Permission errors.  chmod -R 755 /var/www/mysite chown -R www-data:www-data /var/www/mysite assuming your installation is located in /var/www/mysite. On a single-site server it will be /var/www/html "There has been a critical error on your website" = problem 3 above, usually.
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