Why my function in register_uninstall_hook from WP doesn't delete tables
I have this code in my WP plugin:
if (class_exists('mypluginname')) {
$mypluginname = new mypluginname;
register_activation_hook( __FILE__, array($mypluginname, 'activation'));
register_uninstall_hook( __FILE__, array($mypluginname, 'uninstall'));
}
And I have this function in class:
function uninstall() {
if (!defined('WP_UNINSTALL_PLUGIN')) {
die;
}
global $wpdb;
$wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}my_x");
$wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}my_y");
$wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}my_z");
}
If I uninstall my plugin, tables in DB are not deleted. Why?
Solutions
Your class method "uninstall" must be a static class method! https://developer.wordpress.org/reference/functions/register_uninstall_hook/
Try it like this!?
class mypluginname{
static function uninstall() {
if (!defined('WP_UNINSTALL_PLUGIN')) {
die;
}
global $wpdb;
$wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}my_x");
$wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}my_y");
$wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}my_z");
}
}
if (class_exists('mypluginname')) {
register_uninstall_hook( __FILE__, 'mypluginname::uninstall' );
}
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