I would be wary of things you read – e.g. there’s a common myth that “having lots of plugins” is a bad thing, whereas of course what matters is whether they’re well written or not. The time to load a large number of very well written plugins is neglible, whereas a line of bad code … Read more
For the specific case of bbPress, it adds new user roles and capabilities, like the “Keymaster” role. Those users who had a role that was bbPress specific won’t have access to anything anymore, because after you removed the plugin, the role no longer exists. Some users have reported that using the “User Role Editor” plugin … Read more
Caching plugins are very challenging to disable because on top of normal plugin functionality they tend to: created extra drop-in files set caching constants bypass PHP completely with .htaccess While it’s not impossible to mangle specific plugin into submission, it’s flaky. More reliable to explicitly disable it in dev and keep. Note that implicitly stopping … Read more
The short answer is no, it is not possible. When you deactivate your plugin, it’s deactivated so doesn’t run your admin_notices action when the admin screen is refreshed. You can confirm it for yourself by using the action in a slightly different way. In your deactivation function include the following line: set_transient(‘my_deactivation_transient’, ‘My plugin is … Read more
You can hook into the action ‘deactivate_plugin’ to get the plugin’s base name and (as second parameter) if it was deactivated network wide. See wp-admin/includes/plugin.php function deactivate_plugins(). There seems to be no hook for plugin deletion. Sample logging code: add_action( ‘activated_plugin’, ‘t5_plugin_logger’, 10, 2 ); add_action( ‘deactivated_plugin’, ‘t5_plugin_logger’, 10, 2 ); /** * Log plugin … Read more
You can read more about the details of activation on this answer. Basically you need to hook a function to register_activation_hook() – assuming, that this is from within your main plugin folder and not a subfolder: register_activation_hook( __FILE__, ‘on_activation’ ); function wpse65190_on_activation() { // Add an admin notice: add_action( ‘admin_notices’, ‘wpse65190_on_activation_note’ ); // Then you … Read more
You could do this using the WordPress uninstall.php support: <?php if( ! defined( ‘WP_UNINSTALL_PLUGIN’ ) ) exit(); global $wpdb; $wpdb->query( “DROP TABLE IF EXISTS NestoNovo” ); delete_option(“my_plugin_db_version”); ?> This uninstall.php file is called when your plugin is deleted.