How can i delete options on plugin uninstallation?

I want to delete option from database when plugin uninstall. It's name is test_option. I am using this code but doesn't work. Where is problem?

function test_delete() {
    if( !current_user_can( 'activate_plugins' ) )
        return;
    check_admin_referer( 'bulk-plugins' );

    if( __FILE__ != WP_UNINSTALL_PLUGIN )
        return;

    delete_option( 'test_option' );
}

register_uninstall_hook( __FILE__, 'test_delete' );

I want to delete option from database when plugin uninstall. It's name is test_option. I am using this code but doesn't work. Where is problem?

function test_delete() {
    if( !current_user_can( 'activate_plugins' ) )
        return;
    check_admin_referer( 'bulk-plugins' );

    if( __FILE__ != WP_UNINSTALL_PLUGIN )
        return;

    delete_option( 'test_option' );
}

register_uninstall_hook( __FILE__, 'test_delete' );

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Share Improve this question asked Jan 22, 2019 at 17:55 wpdevwpdev 54922 gold badges1313 silver badges2828 bronze badges

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1 Answer 1

Sorted by: Reset to default 2

This will give you the option to register your unistall hook during plugin activation.

function myplugin_activation_callback(){
    register_uninstall_hook( __FILE__, 'myplugin_uninstall_callback' );
}
register_activation_hook( __FILE__, 'myplugin_activation_callback' );

function myplugin_uninstall_callback(){

    //Perform your uninstall operations here 
    delete_option('test_option');

}  

However, the simplest way is to use an uninstall.php file with the following codes:

if (!defined('WP_UNINSTALL_PLUGIN')) {
    die;
}

//Perform your uninstall operations here 
delete_option('test_option');  

It's not recommended to use both at the same time.