从网页中提取关键字

$meta = get_meta_tags(\'http://www.cqhshop.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 );