Hello all,

I'd like to check on a php page that a text string complies with the following rule : Contain numbers,  in ascending order, with only   ,    or    -     as separators

The numbers represent requested items (like pages to print), my purpose is then to count the number of item requested.

 1,3,5-6 : Match (4 items)

1,5,10-12,15,25-30,55 : Match (13 items)

1,5-4,7 : No Match (not ascending order)

Any other caracter but 0123456789,-   no match

Thanks.