在htaccess中使用重定向301或rewriterule重定向并随身携带一个php变量

Question

I think my question is quite simple but I've been banging my head against the wall for the past few hours.

I have my website using rewriterule to ensure messy path names with php variables are now nice and tidy(I've removed [http://www] from my examples because the system thinks I am putting links and won't let me).

So somebody comes to my site at mysite.co.uk/my-product-P1.html the website will know to post mysite.co.uk/product.php?id=1 to the server.

But I also want to tidy it up the other way around. If an old customer or an old link uses the pathname mysite.co.uk/product.php?id=1 then I want it to return mysite.co.uk/my-product-P1.html instead even though the old pathname will actually still work. I don't want customers accessing the same page from different pathnames.

How do I do this and will it create a loop? On another website I have it working using:

RewriteCond %{QUERY_STRING} ^id=1$ [NC]
RewriteRule ^product\.php$ product-P1.html? [R=301,L]

But on that site there are only around 10 products so I'm able to write these lines for each products. On my other site I have hundreds of products so this isn't practical and I need to do it automatically.

Hopefully this makes sense. I have read through other posts and can't find my solution so apologies if this is clearly explained somewhere else.

Answer 1

How do I do this and will it create a loop?

The rules that you have (on the site with 10 products) need to match against the actual request as opposed to the URI:

RewriteCond %{THE_REQUEST} \ /product\.php\?id=([^\ &]+)
RewriteRule ^ /product-P%1.html? [R=301,L]

But you're better off doing this in your php script rather than enumerating all the products in the htaccess file:

On my other site I have hundreds of products so this isn't practical and I need to do it automatically

You can't do that using only mod_rewrite. You'll need to script that in your product.php script. The product.php script will need to check the $_SERVER'[REQUEST_URI'] php variable, and see if it starts with: /product.php.

If it does, then you know someone accessed the php script directly, and you'll need to fetch the product name using the id passed in $_GET['id'], then redirect to the product name + "-P$_GET['id'].html".

The htaccess file and mod_rewrite won't know the mapping between product IDs and product names, so you need to do this in your php script (which does have access to this mapping).