$re = '/^((\*)(\/([0-5]?[0-9]))?|(([0-5]?[0-9])(\/([0-5]?[0-9]))?(-([0-5]?[0-9]))?(,([0-5]?[0-9]))*))$/ms';
$str = '*
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
*/3
*/3/3
62
63
64
65
0/5
0/5/2
14,18
14,18,14,18,14,18
3-39
3-39-50
14,18,3-39,52';
preg_match_all($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