Implementing Redirects and Updating Resources

Configuring 301 permanent redirects from HTTP to HTTPS ensures users and search engines find your secure pages. Implement redirects at the server level for best performance, using .htaccess files for Apache, server blocks for Nginx, or URL Rewrite rules for IIS. Redirect both www and non-www versions to your canonical HTTPS URL. Avoid redirect chains by directing HTTP URLs straight to their final HTTPS destinations.

Updating internal links throughout your website prevents mixed content warnings and ensures optimal performance. Search and replace HTTP references in your database, being careful with serialized data that may break if modified incorrectly. Update hardcoded links in template files, theme files, and plugins. Modify configuration files to use HTTPS URLs for site address settings. Use protocol-relative URLs (//example.com) or HTTPS URLs for all internal resources.

Addressing mixed content issues requires identifying and updating all resources loaded over HTTP. Browser developer tools highlight mixed content warnings in the console. Common culprits include images hosted on HTTP URLs, JavaScript libraries loaded from HTTP CDNs, CSS files with HTTP asset references, and embedded videos or iframes using HTTP. Update these resources to HTTPS versions or host them locally if HTTPS versions aren't available.

Third-party integrations often require updates to maintain functionality after HTTPS migration. Update API endpoints to use HTTPS URLs. Verify payment gateway integrations support HTTPS callbacks. Check social media plugins and sharing buttons for HTTPS compatibility. Update email service integrations and webhook URLs. Some older third-party services may not support HTTPS, requiring replacement with modern alternatives.