I am focusing on a brand new project, using Apache's mod_rewrite and PHP to obtain pretty Web addresses.

This is what my Web addresses seem like:
http://example.tld/foo/bar/1/etc

Observe that there is no trailing slash (that's generate an income write it within the href characteristics of <a>s).

However, I am also permitting http://example.tld/foo/bar/1/etc/ (trailing slash).

Is bad practice? I am wondering if it might be easier to only allow one of the ways or maybe I'd better use trailing slashes in most my links, automatically.

Thanks.

Trailing slashes can generate problems when utilizing relative links within the document, because the browser will treat /etc like a directory.

I'd define one of the ways, and hang up an exterior redirect for that other.

A trailing slash usually signifies a directory, with no trailing slash it signifies personal files.

Permitting both with and without trailing slash may have an adverse impact on your internet search engine ranking, since the same submissions are indexed two times. Stay with one, and perform a 301 redirect if your user demands another.

I'd say for consistency only allow that which you use yourself, then get it redirect (301) the incorrect (with trailing) right one (without trailing), by doing this you will not have duplicate content either.

Obviously what is right and wrong is entirely your decision.