What is wrong with this URL rewrite?

I want (for example)

discuss/1/title/where-are-you

to output

discussPage.php?开发者_运维百科id=1&title=where-are-you

I have the following commands in a .htaccess file which is in the same directory as discussPage.php:

# Enable Rewriting
RewriteEngine on

# Rewrite user URLs
#   Input:  discuss/ID/title/TITLE
#   Output: discussPage.php?tid=NAME&title=TITLE

RewriteRule ^discuss/(\w+)/(\w+)/(\w+)/?$ discussPage.php?id=$1&title=$3

Right now I am getting a 404 error when I try to visit a page like discuss/1/title/where-are-you even though discussPage.php?id=1&title=where-are-you works fine.

P.S. mod_rewrite is enabled (i have used it for other purposes).

Your problem is that \w does not match the "-" in the last bit.

You can simply allow dashes in there using a broader character class like [\w-]+. I would be careful with solutions like [^/] because they allow anything except a slash, which is quite permissive. White-lists are always safer and avoid surprises.

# Enable Rewriting
RewriteEngine on

# Rewrite user URLs
#   Input:  discuss/ID/title/TITLE
#   Output: discussPage.php?tid=NAME&title=TITLE

RewriteRule ^discuss/(\w+)/(\w+)/([\w-]+)/?$ discussPage.php?id=$1&title=$3

Note that the - has to be last in the character class, otherwise you should escape it, because if it's in between two other characters it behaves as a range, like in [a-z].

To debug, you can always echo $_SERVER['QUERY_STRING'];

But I believe the correct code would be something like this.

RewriteEngine on
RewriteBase /

    RewriteRule ^discuss/([0-9]+)/title/([a-z0-9\-]+)?$ discussPage.php?id=$1&title=$2 [NC,QSA]

You might want to fix your RewriteBase value, though.

Also - as seen in the last condition, you can only have alphanumeric characters and hyphens in the where-are-you part. (but something tells me you won't be needing other characters!)

Works for me:

RewriteEngine On
RewriteBase /
RewriteRule ^discuss/([^/]+)/([^/]+)/([^/]+)/?$ discussPage.php?id=$1&title=$3 [R]