PHP: Extract keywords from a webpage

The title said it all: A great code snippet to easily extract meta keywords from any webpage.

<?php

$meta = get_meta_tags('https://thiscode4u.blogspot.com/');

$keywords = $meta['keywords'];

// Split keywords

$keywords = explode(',', $keywords );

// Trim them

$keywords = array_map( 'trim', $keywords );

// Remove empty values

$keywords = array_filter( $keywords );

print_r( $keywords );

?>