Last active
October 1, 2024 10:32
-
-
Save mihdan/97a9cb8108b7aaa978edcac84ad39b82 to your computer and use it in GitHub Desktop.
Устанавливает заголовок `Last-Modified` для WordPress и умеет обрабатывать заголовок `HTTP_IF_MODIFIED_SINCE`
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
add_action( 'template_redirect', 'set_last_modified_headers', 999 ); | |
function set_last_modified_headers() { | |
if ( ( defined( 'DOING_AJAX' ) && DOING_AJAX ) | |
|| ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) | |
|| ( defined( 'REST_REQUEST' ) && REST_REQUEST ) | |
|| ( is_admin() ) ) { | |
return; | |
} | |
/** | |
* if WooCommerce cart, checkout, account - just return | |
*/ | |
if ( class_exists( 'woocommerce' ) && function_exists('is_cart') && function_exists('is_checkout') && function_exists('is_account_page') | |
&& ( is_cart() || is_checkout() || is_account_page() ) ) return; | |
/** | |
* if Search - just return | |
*/ | |
if ( is_search() ) return; | |
$last_modified = ''; | |
/** | |
* If posts, pages, custom post types | |
*/ | |
if ( is_singular() ) { | |
global $post; | |
if ( ! isset($post->post_modified_gmt) ) { | |
return; | |
} | |
$post_time = strtotime( $post->post_modified_gmt ); | |
$modified_time = $post_time; | |
/** | |
* If we have comment set new modified date | |
*/ | |
if ( (int) $post->comment_count > 0 ) { | |
$comments = get_comments( array( | |
'post_id' => $post->ID, | |
'number' => '1', | |
'status' => 'approve', | |
'orderby' => 'comment_date_gmt', | |
) ); | |
if ( ! empty($comments) && isset($comments[0]) ) { | |
$comment_time = strtotime( $comments[0]->comment_date_gmt ); | |
if ( $comment_time > $post_time ) { | |
$modified_time = $comment_time; | |
} | |
} | |
} | |
$last_modified = str_replace('+0000', 'GMT', gmdate('r', $modified_time)); | |
} | |
/** | |
* If any archives: categories, tags, taxonomy terms, post type archives | |
*/ | |
if ( is_archive() || is_home() ) { | |
global $posts; | |
if ( empty($posts) ) { | |
return; | |
} | |
$post = $posts[0]; | |
if ( ! isset($post->post_modified_gmt) ) { | |
return; | |
} | |
$post_time = strtotime( $post->post_modified_gmt ); | |
$modified_time = $post_time; | |
$last_modified = str_replace('+0000', 'GMT', gmdate('r', $modified_time)); | |
} | |
/** | |
* If headers already sent - do nothing | |
*/ | |
if ( headers_sent() ) { | |
return; | |
} | |
if ( ! empty($last_modified) ) { | |
header( 'Last-Modified: ' . $last_modified ); | |
if ( ! is_user_logged_in() ) { | |
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $modified_time) { | |
$protocol = (isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0'); | |
header($protocol . ' 304 Not Modified'); | |
} | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment