Remove the words having special characters from a string

$string = "asdasd óadsa, xxxÂr 123, asda koskso øppp iø1 asdakjd*ads8";
$string = preg_replace('/\S*[^a-z0-9A-Z\s,\.]+\S*/', '', $string);
print "$string\n";

Output: asdasd 123, asda koskso