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Problem with redirecting htaccess 301 with URL variables

If I use this code, it will succeed:

Redirect 301 /products.php http://website.com.au/product_123.php

But if I do this, it is not:

 Redirect 301 /products.php?id=123 http://website.com.au/product_123.php

Note that the variable in the url is causing the error.

What am I doing wrong? Is there any other way to do this? I really need URL variables.

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2 answers

You cannot put query string parameters in the original URI path of the Redirect directive. To do this, you need the mod_rewrite %{QUERY_STRING} :

 RewriteEngine On RewriteCond %{QUERY_STRING} ^id=123$ RewriteRule ^/?product\.php$ http://website.com.au/product_123.php? [L,R=301]

Or make it more general:

 RewriteEngine On RewriteCond %{QUERY_STRING} ^id=([^&]+) RewriteRule ^/?product\.php$ http://website.com.au/product_%1.php? [L,R=301]
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PHP uses the base64_encode and base64_decode functions. First encode the URI and then decode into your redirect function.

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