public function plainText($subject) : bool
    {
        if ($subject === null) {
            return false;
        }
        $v = '' . $subject;
        return $v === '' ? true : !strcmp($v, strip_tags($v));
    }
public function plainText($subject) : bool
    {
        if ($subject === null) {
            return false;
        }
        $v = '' . $subject;
        return $v === '' ? true : !strcmp($v, strip_tags($v));
    }
public function plainText ( $ subject ) : bool { if ( $ subject === null ) { return false ; } $ v = '' . $ subject ; return $ v === '' ? true : ! strcmp ( $ v , strip_tags ( $ v ) ) ; }
Doesn't contain tags.

NB: Returns true on empty ('') string.

@param mixed $subject
Checked stringified.

@return bool
Doesn t contain tags .