Auto Page Links (request)

I would do it as a filter on the_content. You’d get the list of pages, and do a replace for each page name, replacing it with the link to the page. You’re right about only wanting to get the pages once, but that’s fairly simple. You also would only want to build the links to the pages once, since that takes time too, although it’s not a database hit, admittedly.

I have not tested this, so it may have typos and such:

function add_page_links_to_content($content)
{
global $allpages;
global $pagelinks;
if (!isset($allpages)) {
$allpages = get_pages();
foreach ($page in $allpages) {
$pagelinks[$page->ID] = get_page_link($page->ID);
}
}
foreach ($page in $allpages) {
$content = str_replace($page->post_title, '<a href="' . $pagelinks[$page->ID] . '">' . $page->post_title . '</a>', $content);
}
}
add_filter('the_content','add_page_links_to_content');