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hii
i can move wordpress document one host to another then browser display 400 bad request Error please help me.for show error visit: ""

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Since reports a 400 after moving the site but can load it, this pattern points to either a client-side/host-header mismatch (local DNS / hosts file / cookies) or the new server rejecting the request because the Host header or request headers are invalid or too large. Quick, non-destructive checks are useful first steps.

Run these checks from another machine or from the server itself to compare responses:

# get HTTP status and headers
curl -I https://example.com

# test the new server by IP while supplying the Host header
curl -v -H "Host: example.com" http://NEW_SERVER_IP/

WordPress-specific items to verify next (backup the database first). Ensure siteurl and home match the domain you are using; mismatches can cause redirects, cookie differences, or login problems. Example fixes:

# SQL (phpMyAdmin or mysql client)
UPDATE wp_options
SET option_value = 'https://example.com'
WHERE option_name IN ('siteurl','home');

# or with WP-CLI
wp option update home 'https://example.com'
wp option update siteurl 'https://example.com'

A common 400 cause after migration is oversized request headers from cookies (duplicate cookies for www vs non-www) or server security rules (mod_security). Inspect browser devtools for cookie size/count, try an incognito/private window or a different device/network, and reproduce the request with curl -v to see the raw request/response. Also check the webserver error_log and access_log for 400 entries, verify the virtual host configuration (.conf) matches the domain, and review .htaccess for bad redirects. If changes are needed across serialized options, use WP-CLI search-replace or a serialization-aware tool; see the WordPress guide on changing the site URL: Changing the Site URL.

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Member Avatar for Member #949455

i can move wordpress document one host to another then browser display 400 bad request Error please help me.for show error visit:

Did you implement a new code or plugin recently?

Member Avatar for zozzooo

no Admin panel also display same error

Member Avatar for Member #949455

no Admin panel also display same error

There's nothing wrong with your website? I don't see any errors

Member Avatar for zozzooo

But in my Browser Display Error.!!!
I can clear my browser cookes,cache also

Edited by zozzooo
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