$re = '/[\x{0621}-\x{0651}\x{067E}\x{0686}\x{0698}\x{06A9}\x{06AF}\x{06C0}\x{06CC}]+/um';
$str = 'sdf
سلام
حامد فاریابی
سی د عطاء الله مهاجرانی اصل تبریزی
اَحمد کریمی';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php