For my this is best solution.
function strip_tags_content($string) {
// ----- remove HTML TAGs -----
$string = preg_replace ('/<[^>]*>/', ' ', $string);
// ----- remove control characters -----
$string = str_replace("\r", '', $string);
$string = str_replace("\n", ' ', $string);
$string = str_replace("\t", ' ', $string);
// ----- remove multiple spaces -----
$string = trim(preg_replace('/ {2,}/', ' ', $string));
return $string;
}