.htaccess redirect to change parameter value

Question

I would like to change the URL

/index.php?main_page=product_info&cPath=1&products_id=4

to

/index.php?main_page=product_info&cPath=141&products_id=302

I have tried

RewriteRule ^products_id=4$ products_id=302

but that doesn't seem to match.

My .htaccess file currently contains

RewriteEngine on
Options +FollowSymLinks
RewriteRule ^products_id=302$ products_id=4 [L,R=301]

It would seem like I could use something like

RewriteCond %{QUERY_STRING} ^(([^&]*&)*)products_id=4(&.*)?$
RewriteRule ^index\.php$ /index.php?%1products_id=302%3 [L,R=301]

but that doesn't work reliably. (If I click on a link, it doesn't work, but if I enter that URL in the address bar, it does.)

That's because you have it backwards. Should be RewriteRule ^products_id=302$ products_id=4 — Anthony
– Anthony, Commented Sep 3, 2016 at 21:35
You also need Options +FollowSymLinks otherwise mod_rewrite won't work. — Anthony
– Anthony, Commented Sep 4, 2016 at 4:25
The unreliability of clicking on links with the rewriterule you attempted (which looks correct) could be due to your browser caching a previous 301 redirect. They tend to aggressively cache redirects. Test this out in a different browser or private/incognito browsing window. That's always essential when debugging redirects. — Michael Berkowski
– Michael Berkowski, Commented Sep 4, 2016 at 14:23

Amit Verma · Accepted Answer · 2016-09-04 14:41:26Z

1

Try the following rule :

RewriteEngine on

RewriteCond %{THE_REQUEST} /index\.php\?main_page=([^&]+)&cPath=1&products_id=4\sHTTP [NC]
RewriteRule ^ /index.php?main_page=%1&cPath=141&products_id=302 [L,R]

answered Sep 4, 2016 at 14:41

Amit Verma

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