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Move a WordPress site from Apache to a standalone Nginx stack by treating the change as a controlled server migration: make a restorable files-and-database backup, reproduce PHP and database access, translate Apache behavior into an Nginx server block, test on a temporary hostname, then switch traffic with Apache and the backup ready for rollback. Nginx does not read .htaccess, so every rewrite, redirect, security rule, and upload limit that mattered on Apache must be represented in Nginx configuration.
What changes when WordPress moves from Apache to Nginx
WordPress itself is not tied to Apache. Its files, database, PHP runtime, uploads, themes, plugins, scheduled jobs, and URLs can run behind Nginx, normally with PHP-FPM handling PHP requests through FastCGI. The important operational difference is configuration scope: Apache can apply per-directory rules from .htaccess, while Nginx has no directory-level equivalent. WordPress cannot generate Nginx rewrite rules automatically, so the rules must be written in the active Nginx server configuration.
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If the database and public URL remain unchanged, WordPress’s migration guidance says the move can consist of copying the files and database. A server change still requires an inventory of Apache behavior, because redirects, caching, access controls, PHP settings, cron, TLS, and proxy headers may live outside the WordPress directory.
| Area | Apache installation | Nginx target |
|---|---|---|
| Request routing | Often distributed between virtual-host files and .htaccess |
Centralized in one or more Nginx server blocks |
| WordPress permalinks | Usually generated through Apache rewrite rules | try_files $uri $uri/ /index.php?$args; |
| PHP execution | May use an Apache PHP module or another handler | PHP-FPM through FastCGI |
| Rollback | Existing production service | Must be kept deployable until validation and observation are complete |
Plan the migration and freeze changes
Choose the cutover topology
Decide whether Nginx will receive traffic directly or sit behind a load balancer, CDN, or reverse proxy. Record which layer terminates TLS and which layer supplies the original client and protocol headers. A proxy topology changes the details of HTTPS detection, logging, rate limits, and trusted proxy configuration; do not copy a direct-server configuration unchanged into a proxied design.
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For a self-managed server, identify the operating-system service account that will read the document root and the PHP-FPM pool that will execute scripts. On managed WordPress hosting, ask the host to confirm supported Nginx and PHP-FPM versions, staging access, backup restoration, and whether customers are allowed to edit server blocks. WordPress advises managed-hosting customers to consult their host before changing server configuration.
Inventory the live Apache site
Write down the current state before installing anything. Capture:
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- PHP version, loaded extensions, PHP-FPM or module settings, memory and upload limits, and the version requirements of active plugins and themes.
- Database engine and endpoint, database name, username, host, port, character set, and where credentials are stored.
- All
.htaccessfiles, including rules in subdirectories, redirects, password protection, cache controls, and security restrictions. - TLS certificate and private-key locations, renewal automation, HSTS settings, and any load balancer or CDN configuration.
- System cron entries, WordPress scheduled events, queue workers, outbound email, webhooks, firewall rules, and monitoring checks.
- DNS records and TTL values, including the IPv4 and IPv6 addresses that may continue sending traffic to Apache.
Schedule a content freeze
Announce a short maintenance window or freeze publishing, comments, orders, form submissions, and other writes. A freeze prevents the final database export from missing content created while files are being copied. If a full freeze is impossible, use a repeatable synchronization process and take a final export immediately before DNS or load-balancer cutover.
Back up files and database before touching production
Make a complete file copy
Copy the entire WordPress directory, not only the visible site pages. The backup must include wp-config.php, core files, wp-content/plugins, wp-content/themes, wp-content/uploads, must-use plugins, custom drop-ins, and any web-server snippets stored alongside the site. Preserve symbolic links, file names, permissions metadata where practical, and hidden files such as .maintenance or deployment manifests.
Export and verify the database
Export every WordPress table and record the database server version and character set. A backup is not restorable merely because a command completed: inspect the export for expected table names and a plausible file size, and perform a test import into an isolated database when possible. Record the credentials needed for restoration separately from the web files.
Keep the original Apache service online and store a second copy of the files and database on separate physical media, such as a portable external SSD. Restrict access to the copy because it contains credentials, session salts, private uploads, and potentially personal data. Do not delete the Apache document root until the Nginx site has passed checks and the agreed observation period has ended.
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Label the backup with the export time, WordPress version, PHP version, database endpoint, and the exact configuration revision used for the cutover. Decide in advance who can switch DNS or the load balancer back to Apache, where the restore commands are documented, and which symptoms trigger an immediate rollback. A rollback plan that depends on discovering credentials during an outage is not a tested rollback plan.
Provision Nginx, PHP-FPM, and the target document root
Install compatible runtime components
Install Nginx and a PHP-FPM version compatible with the existing WordPress core, themes, and plugins. Compatibility is an application question, not simply a web-server question: compare the PHP requirements declared by active plugins with the target PHP version, and install required extensions for image processing, database access, XML, JSON, string handling, and internationalization as applicable to the site.
Copy files and set ownership
Create a new document root, copy the verified WordPress files, and set ownership and permissions appropriate to the Nginx and PHP-FPM service accounts. The web process needs to read core files and write only to locations that WordPress legitimately updates, commonly uploads and selected cache directories. Avoid making the entire installation world-writable.
Confirm the PHP-FPM endpoint
Before writing the server block, confirm whether PHP-FPM listens on a Unix socket or a TCP address. Note the exact socket path, pool name, and service status. A correct Nginx configuration pointing to a nonexistent socket produces gateway errors even when PHP-FPM is installed and running under a different path.
Translate Apache rules into an Nginx server block
Start with a minimal configuration that serves WordPress and sends nonexistent paths to index.php. Replace the hostname, document root, and PHP-FPM socket with values from the target host.
server {
listen 80;
server_name example.com www.example.com;
root /var/www/example.com;
index index.php;
location / {
try_files $uri $uri/ /index.php?$args;
}
location ~ .php$ {
try_files $uri =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_pass unix:/run/php/php8.3-fpm.sock;
}
}Why the try_files line matters
The expression try_files $uri $uri/ /index.php?$args; serves an existing file or directory directly and passes other requests, including pretty permalinks, to WordPress while preserving the query string. Removing the query-string portion can break searches, feeds, pagination, REST requests, and plugin parameters. Changing the fallback to a static 404 breaks ordinary WordPress permalinks.
Translate every behavior from .htaccess
Read each Apache rule and decide what it does before converting it. A redirect may belong in an Nginx return or rewrite; a denied file pattern may need a narrowly scoped location; cache headers may belong in a location block or upstream cache; and authentication rules may need an Nginx access policy. Do not paste Apache syntax into Nginx. Test rules for precedence, because a more specific Nginx location can bypass a general PHP or security rule.
Add upload-size limits, cache policy, security restrictions, and application-specific redirects only after the basic site works. Keep the initial configuration small enough that an error can be isolated. Validate the configuration with the platform’s Nginx syntax-test command before reloading, then inspect the error log after the reload.
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Restore WordPress configuration and database connections
Review wp-config.php
Restore the file and verify DB_NAME, DB_USER, DB_PASSWORD, and DB_HOST. WordPress calls out these changes when the database was moved, renamed, or assigned a different user or host. Preserve salts and other constants unless you deliberately rotate them; changing salts logs users out and can invalidate sessions.
Check constants that affect filesystem paths, debugging, cache drop-ins, reverse proxies, cookie domains, and HTTPS detection. Remove temporary debugging output before exposing the new server to visitors. Ensure the PHP-FPM process can read the configuration without making its secrets downloadable as static files.
Keep URLs unchanged when possible
If the domain and path stay the same, do not perform a database-wide URL replacement just because the web server changed. Confirm the WordPress Address and Site Address in Settings → General, then test the site using the real canonical hostname on the Nginx target.
Update URLs safely when they really change
If the domain, protocol, or installation path changes, update both WordPress URL settings and review theme templates, widgets, custom code, menus, and plugin configuration for hard-coded links. Avoid blind search-and-replace operations on serialized WordPress data: changing string lengths without a serialization-aware method can corrupt arrays and options. Use a migration tool or procedure that understands serialized values, and take a fresh database backup immediately before it runs.
Recreate HTTPS, canonical redirects, and proxy headers
Create an HTTPS server block with the certificate chain and private key, then redirect the intended HTTP host to the canonical HTTPS host. Also reproduce any old Apache redirects for retired paths, changed slugs, and alternate hostnames. Preserve query strings unless a redirect intentionally removes them.
When a proxy or load balancer remains in front, configure trusted forwarding behavior consistently. The application must receive the correct original protocol, commonly through X-Forwarded-Proto, or it may generate HTTP links on an HTTPS visit, loop between HTTP and HTTPS, or mark secure cookies incorrectly. Do not trust arbitrary client-supplied forwarding headers when the request did not come through a controlled proxy.
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Check the certificate chain from an external client, confirm the canonical host, and look for mixed-content warnings caused by old absolute HTTP URLs. Review robots.txt, XML sitemaps, canonical tags, and security headers after redirects are working; a server migration can expose a staging hostname or accidentally block crawlers.
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Use a temporary hostname, a local hosts-file entry, or an internal load-balancer route that reaches Nginx without sending public traffic there. Test with a realistic account and representative content, not only the home page.
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- Administration: sign in through
/wp-login.php, open/wp-admin/, edit content, install no changes during the test, and inspect plugin administration screens. - Media: upload a new image, view an existing upload, generate a thumbnail, and test a large file near the configured limit.
- Application paths: submit forms, exercise REST API and AJAX requests, test comments or checkout flows where applicable, and verify outgoing email and webhooks.
- Background work: confirm system cron or the chosen WordPress scheduling mechanism runs once, processes due events, and does not create duplicate jobs.
- Observability: watch PHP-FPM, Nginx access, and Nginx error logs while testing. Check status codes, response times, cache headers, upstream failures, and disk space.
- Security: request sensitive files such as
wp-config.phpand hidden files from a safe test client to confirm they are not served; verify firewall rules, rate limits, and administrative restrictions. - SEO and browser behavior: inspect canonical redirects, HTTPS, cookies, robots.txt, sitemap URLs, mixed-content warnings, and whether browser caches retain obsolete redirects.
Interpret common failures
| Symptom | Likely cause | First check |
|---|---|---|
| 404 on every pretty permalink | Missing or overridden WordPress fallback | Confirm the try_files line is in the active location / block and reload succeeded. |
| 502 Bad Gateway on PHP pages | Wrong PHP-FPM socket, stopped service, or permission failure | Compare fastcgi_pass with the running pool endpoint and read the Nginx error log. |
| Downloads of PHP source | PHP location is absent or misordered | Stop public traffic, correct the PHP location, and verify static-file handling before retrying. |
| Redirect loop | Conflicting HTTP/HTTPS rules or incorrect proxy protocol header | Trace each hop and verify which layer terminates TLS and sets X-Forwarded-Proto. |
| Uploads fail at a specific size | Nginx, PHP, or application upload limits differ | Compare Nginx request limits, PHP upload settings, and the plugin’s own limit. |
| Admin works but images or CSS fail | Wrong document root, permissions, URL, or cache rule | Inspect the failing asset URL, filesystem path, response status, and browser console. |
Cut over traffic with a tested rollback
- Lower DNS TTL ahead of the maintenance window if DNS will change. A lower TTL cannot force every resolver to switch immediately, so keep both services capable of serving during propagation.
- Enable maintenance mode or stop writes according to the plan. Take a final database export and synchronize files changed since the first copy, especially uploads and plugin-generated assets.
- Activate the production Nginx configuration, certificates, PHP-FPM pool, firewall rules, and monitoring. Test the canonical hostname locally before changing public routing.
- Switch DNS or the load balancer to Nginx. Confirm both IPv4 and IPv6 records, health checks, and any CDN origin settings point to the intended target.
- Monitor logs and key transactions continuously: login, publishing, uploads, forms, orders, email, scheduled jobs, redirects, and error rates.
- Keep Apache, the original files, the verified database backup, and the Nginx configuration revision available for the agreed observation period. Do not decommission the old service merely because the first page load succeeds.
Rollback procedure
If a critical check fails, route traffic back to Apache using the prearranged DNS or load-balancer change. If users wrote data on Nginx after the switch, preserve those records and decide whether they must be merged before restoring the previous database. Restore the last known-good database only when necessary, because a restore can discard legitimate post-cutover writes. Correct the Nginx rule, PHP-FPM setting, permission, or application configuration, retest privately, and schedule another cutover rather than repeatedly changing production under load.
Self-managed Nginx or managed hosting?
| Decision factor | Self-managed Nginx | Managed WordPress environment |
|---|---|---|
| Operational control | Direct control of server blocks, PHP-FPM pools, TLS, firewall, and logs. | Provider controls some or all server configuration; confirm what can be changed. |
| Compatibility work | You translate rewrites, redirects, PHP behavior, and proxy settings. | The host may provide migration or staging assistance, but verify its exact scope. |
| Rollback speed | Depends on accessible file/database backups and DNS or load-balancer control. | Depends on the provider’s restore process, retention, and support response. |
| Maintenance burden | You patch Nginx, PHP-FPM, TLS, database, operating system, and WordPress. | The provider may patch infrastructure; establish responsibility for WordPress and plugins. |
| Traffic handling | You design direct Nginx, proxy, cache, and scaling topology. | The provider may include a proxy or cache; verify forwarding headers and purge behavior. |
After migration: hardening and ongoing operations
- Remove temporary hosts-file entries, staging DNS records, debug flags, and maintenance pages.
- Document the final server block, PHP-FPM endpoint, certificate renewal method, redirect map, cron ownership, and backup restore steps.
- Schedule independent file and database backups, test restoration periodically, and retain at least one copy separate from the server.
- Monitor disk space, PHP-FPM saturation, Nginx errors, slow requests, failed scheduled events, certificate expiry, and backup freshness.
- Review permissions after plugin updates and confirm that only intended directories are writable.
- Patch Nginx, PHP-FPM, the operating system, WordPress core, themes, and plugins through a change process that includes a current backup and a rollback decision.
- Keep a record of DNS TTLs and the person authorized to redirect traffic, so an emergency return to Apache does not depend on one unavailable administrator.
Migration completion criteria
The migration is complete when the canonical HTTPS site serves all tested content, pretty permalinks and redirects behave as intended, administration and uploads work, PHP-FPM and scheduled jobs are healthy, logs show no unresolved errors, and the team can restore files and the database or redirect traffic to Apache using the documented rollback steps. Until those conditions are met, treat Nginx as a candidate target rather than the only production path.
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