How to Customize Excerpts for Password Protected WordPress Pages

<?php

/** 
 * Snippet Name: Custom excerpt for password protected pages 
 * Snippet URL: https://wpcustoms.net/snippets/custom-excerpt-password-protected-pages/ 
 */  
function password_required_excerpt( $excerpt ) {  
    if ( post_password_required() )  
    {  
        $excerpt = 'This is a private page to request the password please contact the site administrator.';  
    }  
  
    return $excerpt;  
}  
add_filter( 'the_excerpt', 'password_required_excerpt' );