Reminder: Zend Framework Route Regex

If you want to make the route / optional

'archive(?:/(\d+))?' 

A note about the above regular expression. It uses one of the "expression syntax" which uses ?:

This means that every digit inside (?:) will NOT be group and outputted separately.

Consider this:

$t = 'archive/1234';

preg_match('#archive(?:/(\d+))?#', $t, $matches);

//outputs

array(

[0] => archive/1234
    [1] => 1234

)

Whereas without ?:

$t = 'archive/1234';

preg_match('#archive(/(\d+))?#', $t, $matches);

//outputs

Array
(
    [0] => archive/1234
    [1] => /1234
    [2] => 1234
) 

notice that if you include ?: that the "/1234" did not get outputted.