$re = '/([^-]*)$/m';
$str = '12345-LATIS
234134-CRISE
13241234-P-ORACLE
134134-ORACLE
1341324-ENS
134134-P-NIBS
134123415-LATIS
11513423-CRISE
1-34555
A-33433
12-23434
5-3451-A
';
preg_match_all($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