$re = '/Total Present\s-\s(\d+)\sTotal Absent\s-\s(\d+).*(?<=Total Duration - )(\d.*)(?=Total T\.Duration)/m';
$str = 'Total Present - 26 Total Absent - 0 Total Leave Taken - 0 Total Weekly Off Present - 2 Total Duration - 252:00 Total T.Duration - 252:00 Total Over Time - 00:00 Total LateBy - 00:00 (Hrs.) Total EarlyBy - 00:00 (Hrs.) Total Regular OT - 00:00 (Hrs.)';
preg_match_all($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