/**
* Sets headers on archives
*/
function addh_set_headers_for_archive($options)
{
// WordPress archives list the posts that belong to the archive from
// newest to oldest. We set the HTTP headers for the archive page based
// on the first post of the archive (newest).
// There is no need to check for pagination, since every page of the archive
// has different posts.
//global $post; // Using this is possibly a mistake. This should be term/author/date object of the archive.
// Get our post object from the list of posts.
global $posts;
if (empty($posts)) {
return;
}
$post = $posts[0];
// The post object we use for the HTTP headers is the latest post.
// Here it is possible to filter this post object and use what you want.
$post = apply_filters('addh_archive_post', $post);
// Valid post types: post
if (!is_object($post) || !isset($post->post_type) || !in_array(get_post_type($post), addh_get_supported_post_types_archive())) {
return;
}
// Retrieve stored time of post object
$post_mtime = $post->post_modified_gmt;
$mtime = strtotime($post_mtime);
addh_batch_generate_headers($post, $mtime, $options);
}
/**
* Sets headers on archives
*/
function addh_set_headers_for_archive($options)
{
// WordPress archives list the posts that belong to the archive from
// newest to oldest. We set the HTTP headers for the archive page based
// on the first post of the archive (newest).
// There is no need to check for pagination, since every page of the archive
// has different posts.
//global $post; // Using this is possibly a mistake. This should be term/author/date object of the archive.
// Get our post object from the list of posts.
global $posts;
if (empty($posts)) {
return;
}
$post = $posts[0];
// The post object we use for the HTTP headers is the latest post.
// Here it is possible to filter this post object and use what you want.
$post = apply_filters('addh_archive_post', $post);
// Valid post types: post
if (!is_object($post) || !isset($post->post_type) || !in_array(get_post_type($post), addh_get_supported_post_types_archive())) {
return;
}
// Retrieve stored time of post object
$post_mtime = $post->post_modified_gmt;
$mtime = strtotime($post_mtime);
// Check for old content (only if a threshold is set)
if (absint($options['cache_old_content_threshold_seconds']) > 0) {
// Find the time that determines whether a resource should be treated as 'old content'.
// Basically this is the current GM time minus the 'old content threshold in seconds' as set in the option.
$threshold_time_unix = absint(gmdate('U')) - absint($options['cache_old_content_threshold_seconds']);
// Any content which has been last modified before that time should be treated as old
// and the 'cache_old_content_max_age_seconds' option should be used as the caching
// timeout, instead of 'cache_max_age_seconds'.
// Here we check whether the mtime (last modified time) is older than the threshold time.
if ($mtime < $threshold_time_unix) {
// This content is old. Set the caching timeout to the caching timeout of old content.
$options['cache_max_age_seconds'] = $options['cache_old_content_max_age_seconds'];
}
}
addh_batch_generate_headers($post, $mtime, $options);
}
