$re = '/(?m)^([0-9]{9})\s+(E[0-9]+(?: [0-9]+)?)\s*-\s*([^-\n]+(?:-[^-\n]+)*?)(?>-([0-9]+\.[0-9]{1,2}))?$/';
$str = '700012839 E703 - DOMAINE PREST NON OUVERT PAR L AMC
000001708 E0480 0051- NUAT. (DRE) 0.00-0.00
000279001 E0317 0511 - INCOMPATIBILITE ASU-NAT / REGIME 0.00-1.00';
preg_match_all($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