문자열에서 영문+숫자만추출하기

$line ="ABAFDSAFDSFasdfds12.l,~__ㅇ.. ABCfd 3412321fdsaf한글";

$pattern = '/([a-z|A-Z|._~])+/';

preg_match_all($pattern, $line, $match);

echo $line," --> ";

echo implode('', $match[0])."\n";