Restore WordPress User Password Using Email

Reset-WordPress-Password.php

/**
 * Reset a user's password by email.
 *
 * @param string $password   New plain-text password.
 * @param string $user_email User's email address.
 */
function custom_reset_password($password, $user_email) {
    $user = get_user_by('email', $user_email);

    if ($user && !is_wp_error($user)) {
        wp_set_password($password, $user->ID);
        // Optional: log user out of all sessions
        wp_clear_auth_cookie();
    }
}

// Example usage
custom_reset_password('MY_NEW_PASSWORD', '[email protected]');

/**
 * INSTRUCTIONS:
 * =============
 * - Paste this code in your theme's functions.php file
 * - Visit your homepage OR any other page
 * - Delete this custom code from functions.php after password reset
 * - Login with your new password
 * - Done!
 */