.htaccess regular expression need to make trailing forward slash optional

Question

I need to include an optional trailing forwardslash, that\'s an /, in my RewriteRule

What I have so far is

RewriteRule ^([a-zA-Z0-9]+)$ u.php?$1|$2
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Answer 1

Just put /? before the $ at the end in your pattern:

RewriteRule ^([a-zA-Z0-9]+)/?$ u.php?$1

But I would rather suggest you to allow just one spelling (either with or without trailing slash) and redirect the other one:

# remove trailing slash
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*)/$ /$1 [L,R=301]
# add trailing slash
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule .*[^/]$ /$0/ [L,R=301]