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Canonical: Redirect paged requests for non-paginated posts to the post permalink.

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This avoids displaying duplicate content of the same post under different URLs and ensures the canonical URL is correct.

Previously, requests for invalid page numbers were only redirected to the post permalink if the post was actually paginated using the `<!--nextpage-->` marker.

Follow-up to [34492].

Props jeremyfelt, prografika, sachit.tandukar, subrataemfluence, hronak, ekatherine, henry.wright, chesio, dd32, SergeyBiryukov.
Fixes #40773. See #45337, #28081, #11694.

git-svn-id: https://develop.svn.wordpress.org/trunk@47727 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Sergey Biryukov 2020-04-30 12:03:11 +00:00
parent be8b8baec9
commit af596bcc5b
4 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/wp-includes/canonical.php
View File

@ -157,8 +157,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
}
}
if ( get_query_var( 'page' ) && $wp_query->post &&
false !== strpos( $wp_query->post->post_content, '<!--nextpage-->' ) ) {
if ( get_query_var( 'page' ) && $wp_query->post ) {
$redirect['path'] = rtrim( $redirect['path'], (int) get_query_var( 'page' ) . '/' );
$redirect['query'] = remove_query_arg( 'page', $redirect['query'] );
$redirect_url = get_permalink( $wp_query->post->ID );

11
src/wp-includes/class-wp.php
View File

@ -678,9 +678,14 @@ class WP {
// Check for paged content that exceeds the max number of pages.
$next = '<!--nextpage-->';
if ( $p && false !== strpos( $p->post_content, $next ) && ! empty( $this->query_vars['page'] ) ) {
$page = trim( $this->query_vars['page'], '/' );
$success = (int) $page <= ( substr_count( $p->post_content, $next ) + 1 );
if ( $p && ! empty( $this->query_vars['page'] ) ) {
// Check if content is actually intended to be paged.
if ( false !== strpos( $p->post_content, $next ) ) {
$page = trim( $this->query_vars['page'], '/' );
$success = (int) $page <= ( substr_count( $p->post_content, $next ) + 1 );
} else {
$success = false;
}
}
}

3
tests/phpunit/tests/canonical.php
View File

@ -175,6 +175,9 @@ class Tests_Canonical extends WP_Canonical_UnitTestCase {
array( '/2008/09/03/images-test/?page=3', '/2008/09/03/images-test/3/' ),
array( '/2008/09/03/images-te?page=3', '/2008/09/03/images-test/3/' ),
array( '/2008/03/03/comment-test/3/', '/2008/03/03/comment-test/' ),
array( '/2008/03/03/comment-test/?page=3', '/2008/03/03/comment-test/' ),
// Comments.
array( '/2008/03/03/comment-test/?cpage=2', '/2008/03/03/comment-test/comment-page-2/' ),

3
tests/phpunit/tests/link/wpGetCanonicalURL.php
View File

@ -11,7 +11,8 @@ class Tests_WpGetCanonicalURL extends WP_UnitTestCase {
public static function wpSetUpBeforeClass( $factory ) {
self::$post_id = $factory->post->create(
array(
'post_status' => 'publish',
'post_content' => 'Page 1 <!--nextpage--> Page 2 <!--nextpage--> Page 3',
'post_status' => 'publish',
)
);
}