$re = '/.*\/\s*(\d+)\s*$/m';
$str = '1 / 132 / 133 / 134 / 135 / 136 / 137 / 138 / 139 / 1310 / 1311 / 1312 / 1313 / 13
1 / 82 / 83 / 84 / 85 / 86 / 87 / 88 / 8
1 / 152 / 153 / 154 / 155 / 156 / 157 / 158 / 159 / 1510 / 1511 / 1512 / 1513 / 1514 / 1515/ 15';
preg_match_all($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