$re = '/^(?:Manifest.*|.*\.[sS][iI][gG]|.*\.[tT][aA][rR]|[0-9]{2}-[0-9]{2}.*|first.*|latest.*)$/m';
$str = 'Manifest.MoM.tar
Manifest-random-pack
Manifest.full
latest
latest_version
latest.sig
latest_version.sig
first
first.sig
10-20-randomnumber
randomnumber.tar';
preg_match_all($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