mod rewrite question

[utahgolfer]

Hi i need some help with reading a URI from right to left.

for example how can i grab only the last two directories

1/2/3/4/ are directories and i want to read only 3/4/. So only grab the last 2 directories no matter how many previous directories there are, and rewrite on those two values.

Any help would be appreciated.

[g1smd]

Something like

[b]/[/b]([^/]+)[b]/[/b]([^/]+)[b]$[/b]

or this

[b]/[/b]([^/]+)[b]/[/b]([^/]+)[b]/$[/b]

would likely be a starting point.

It is end-anchored, but not start anchored.

I am guessing it is quite inefficient.

It doesn't work if there are less than three items (because leading / isn't shown to RewriteRule in .htaccess).

You'd need another rule with a start anchor to test for that particular case; like

[b]^[/b]([^/]+)[b]/[/b]([^/]+)[b]$[/b]

or this

[b]^[/b]([^/]+)[b]/[/b]([^/]+)[b]/$[/b]

I suspect that jd probably has a better idea. :-)