All pages redirect to home page in wordpress

It sounds like there could be several potential causes for the problem. Here are some steps you can try to resolve the issue, considering you have FTP access:

1. Check the `.htaccess` File

Since you’ve already tried creating a new .htaccess file, make sure it contains the default WordPress rules:

# BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

Ensure that this file is in the root directory of your WordPress installation.

2. Disable Plugins

Sometimes plugins can cause conflicts or issues. Rename the plugins folder found in wp-content (to something like plugins_old). This will deactivate all plugins. If this resolves the issue, you’ll know it was a plugin conflict. You can then rename the folder back and disable plugins one by one to identify the culprit.

3. Switch to a Default Theme

A theme issue might also cause the problem. Rename your current theme folder in wp-content/themes. WordPress will revert to a default theme like Twenty Twenty-One. If this fixes the issue, the problem is likely with your theme.

4. Check the `wp-config.php` File

Ensure that the wp-config.php file is correctly configured, especially the WordPress Address (URL) and Site Address (URL) settings.

5. Increase PHP Memory Limit

Sometimes, memory limit issues can cause problems. Try increasing the memory limit by adding the following line to your wp-config.php file:

define('WP_MEMORY_LIMIT', '256M');

6. Check File Permissions

Incorrect file permissions can also lead to issues. Ensure that directories are set to 755 and files to 644. You can do this via FTP.

7. Restore from a Backup

If you have a recent backup of your site (files and database), consider restoring it. This might be the quickest way to get your site back up and running if the issue is complex.

8. Debugging

Enable debugging in WordPress to see if any specific errors are being logged. Add these lines to your wp-config.php file:

define('WP_DEBUG', true); 
define('WP_DEBUG_LOG', true); 
define('WP_DEBUG_DISPLAY', false);

9. Check for URL Redirects in Settings

Since you can’t access the WP admin, you might need to check the siteurl and home values directly in the WordPress database via phpMyAdmin. Look in the wp_options table for these values.

10. Contact Hosting Provider

If none of these steps work, your hosting provider may be able to assist. They can often provide insights from server logs that aren’t available to you.

Remember to take a backup of any file or database before making changes. This ensures you can revert to the current state if needed. If you’re not comfortable performing these steps, it might be best to consult with a professional WordPress developer.

1. Check the .htaccess File