– What is WordPress Hook: login_form_{$action}
The login_form_{$action} hook in WordPress is used to modify the login form based on the specific action being performed, such as login, registration, or lost password.

– Understanding the Hook: login_form_{$action}
The login_form_{$action} hook is located within the wp-login.php file and is specifically used to customize the login form based on the action being performed by the user. This allows developers to add or remove fields, change error messages, or modify the form layout based on the specific action.

– Hook Parameters (if applicable): login_form_{$action}
The login_form_{$action} hook does not accept any parameters.

– Hook Doesn’t Work: login_form_{$action}
If the login_form_{$action} hook doesn’t work as expected, it could be due to incorrect placement within the code, conflicts with other plugins or themes, or incorrect usage of the hook. To troubleshoot, ensure that the hook is placed within the correct file and that there are no conflicts with other code.

– Best Practices & Usage Notes (if applicable): login_form_{$action}
When using the login_form_{$action} hook, it’s important to consider the specific action being performed and to only make necessary modifications to the login form. It’s also important to test any changes thoroughly to ensure they work as expected and do not cause any issues with the login process.

– Usage Example: login_form_{$action}
“`php
function custom_login_form_fields( $action ) {
if ( ‘login’ === $action ) {
// Add custom fields or modify the login form for the login action
} elseif ( ‘lostpassword’ === $action ) {
// Modify the form for the lost password action
}
}
add_action( ‘login_form_login’, ‘custom_login_form_fields’ );
add_action( ‘login_form_lostpassword’, ‘custom_login_form_fields’ );
“`