What are the potential challenges or pitfalls when integrating HTTPS/SSL into a PHP website?

One potential challenge when integrating HTTPS/SSL into a PHP website is ensuring that all resources (images, scripts, stylesheets) are also loaded securely to avoid mixed content warnings. To solve this issue, you can use relative URLs or update all resource URLs to use HTTPS. 

// Update resource URLs to use HTTPS
function update_resource_urls($content) {
    $content = str_replace('http://', 'https://', $content);
    return $content;
}

// Hook into the_content filter to update URLs
add_filter('the_content', 'update_resource_urls');

Keywords

SSL certificate HTTPS mixed content cURL certificate validation

Related Questions