How to use login_form action in WordPress

login_form action

Fires following the ‘Password’ field in the login form.

To use login_form action, first you have to register it using add_action. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

We at WePlugins, always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function execute_on_login_form_event and we registered it using add_action. The first parameter login_form is the name of the hook, the second parameter execute_on_login_form_event is the name of the function which needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times, and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use remove_action to remove login_form action.

Parameters

• No parameters

Live Example 1

Add extra fields in the login form.

add_action( 'login_form', 'weplugins_add_login_fields' );
    function weplugins_add_login_fields() {
        // Get and set any values already sent
        $user_extra = ( isset( $_POST['user_extra'] ) ) ? $_POST['user_extra'] : '';
        ?>
        <p>
            <label for="user_extra"><?php _e('Extra Field','mydomain') ?><br />
            <input type="text" name="user_extra" id="user_extra" class="input" value="<?php echo esc_attr(stripslashes($user_extra)); ?>" size="25" /></label>
        </p>
        <?php
    }&#91;/php&#93;

    <h2>Live Example 2</h2>
    <p>Execute a custom function when the login form is displayed.</p>
    function weplugins_execute_on_login_form_event(){
        // You can write code here to be executed when this action occurs in WordPress website according to your requirements.
    }
    // Add the action
    add_action( "login_form", "weplugins_execute_on_login_form_event");

Live Example 3

Remove a hook callback.

remove_action( "login_form", "weplugins_execute_on_login_form_event");

Please make sure to provide the same callback function name, priority, and number of arguments while removing the hook callback.