Are there alternative methods to the get_page_link() function in Wordpress for retrieving page URLs, especially when encountering undefined function errors in custom PHP scripts?

When encountering undefined function errors with get_page_link() in custom PHP scripts in WordPress, an alternative method to retrieve page URLs is to use get_permalink() function. This function can be used to get the permalink of a specific post or page by passing the post ID or post object as a parameter. By using get_permalink() instead of get_page_link(), you can avoid the undefined function errors and successfully retrieve the page URLs in your custom PHP scripts.

// Get the page URL using get_permalink() function
$page_id = 123; // Replace 123 with the actual page ID
$page_url = get_permalink($page_id);

// Output the page URL
echo $page_url;