嘿，伙计们，我正在尝试为下一页/上一页建立分页链接。例如，我的页面结构如下：
当我在a2上时，我希望“上一页”链接转到a1，但“下一页”链接转到b1（跳过B）。
我在用greatNext Page, Not Next Post 插件，但它只能转到下一页（因此在上面的示例中会包含B）。
我试图修改它，只显示堂兄弟，但遇到了一些麻烦。到目前为止，我有：
// query gand parent page level, go to next parent page, and then loop to find it\'s next child, eke!
// get grandparent id
$parentInfo = get_page($post->post_parent);
// query the level above\'s pages
// $getParentPages = get_pages(\'child_of=\'.$parentInfo->post_parent.\'&parent=\'.$parentInfo->post_parent.\'&\'.$getPagesQuery);
$getParentPages = get_pages($getPagesQuery);
$parentPageCount = count($getParentPages);
for($pp=0; $pp < $parentPageCount; $pp++) {
// get the array key for our entry
// if ($post->post_parent == $getParentPages[$pp]->ID) break;
if ($post->ID == $getParentPages[$pp]->ID) break;
}
// assign our next key
$parentNextKey = $pp+1;
if (isset($getParentPages[$parentNextKey])) {
$anchorName = $getParentPages[$parentNextKey]->post_title;
$output = \'<a href="\'.get_permalink($getParentPages[$parentNextKey]->ID).\'" title="\'.$anchorName.\'">\';
}
那么我该如何跳过B，转到b1等等？
谢谢你的帮助！
-德鲁
最合适的回答,由SO网友:Jan Fabry 整理而成
我通过获取所有页面，按级别分配它们，然后获取同一级别的下一页来解决这个问题。如果还需要上一页，则可能应该缓存按级别对页面分组的功能。
function wpse16875_next_page_same_level_link()
{
$next_page_same_level = wpse16875_next_page_same_level();
if ( $next_page_same_level ) {
return \'<a href="\' . get_permalink( $next_page_same_level ) . \'">\' . get_the_title( $next_page_same_level ) . \'</a>\';
}
return \'\';
}
function wpse16875_next_page_same_level()
{
$current_page = $GLOBALS[\'post\'];
$current_page_level = null;
$all_pages = get_pages();
$pages_by_id = array();
$page_ids_by_parent_id = array();
$page_ids_by_level = array();
foreach ( $all_pages as $page ) {
$pages_by_id[$page->ID] = $page;
if ( ! array_key_exists( $page->post_parent, $page_ids_by_parent_id ) ) {
$page_ids_by_parent_id[$page->post_parent] = array();
}
$page_ids_by_parent_id[$page->post_parent][] = $page->ID;
}
foreach ( $all_pages as $page ) {
$ancestor_page_id = $page->post_parent;
$level = 0;
while ( 0 != $ancestor_page_id ) {
$ancestor_page_id = $pages_by_id[$ancestor_page_id]->post_parent;
$level++;
}
if ( $page->ID == $current_page->ID ) {
$current_page_level = $level;
}
if ( ! array_key_exists( $level, $page_ids_by_level ) ) {
$page_ids_by_level[$level] = array();
}
$page_ids_by_level[$level][] = $page->ID;
}
$current_level_page_ids = $page_ids_by_level[$current_page_level];
$current_page_pos_by_level = array_search( $current_page->ID, $current_level_page_ids );
if ( array_key_exists( $current_page_pos_by_level + 1, $current_level_page_ids ) ) {
return $pages_by_id[$current_level_page_ids[$current_page_pos_by_level + 1]];
}
return null;
}
