Gets the data structure representing a named menu tree.
Since this can be the full tree including hidden items, the data returned may be used for generating an an admin interface or a select.
$menu_name: The named menu links to return
$link: A fully loaded menu link, or NULL. If a link is supplied, only the path to root will be included in the returned tree - as if this link represented the current page in a visible menu.
$max_depth: Optional maximum depth of links to retrieve. Typically useful if only one or two levels of a sub tree are needed in conjunction with a non-NULL $link, in which case $max_depth should be greater than $link['depth'].
An tree of menu links in an array, in the order they should be rendered.
function menu_tree_all_data($menu_name, $link = NULL, $max_depth = NULL) {
$tree =& drupal_static(__FUNCTION__, array());
// Use $mlid as a flag for whether the data being loaded is for the whole tree.
$mlid = isset($link['mlid']) ? $link['mlid'] : 0;
// Generate a cache ID (cid) specific for this $menu_name, $link, $language, and depth.
$cid = 'links:' . $menu_name . ':all:' . $mlid . ':' . $GLOBALS['language']->language . ':' . (int) $max_depth;
if (!isset($tree[$cid])) {
// If the static variable doesn't have the data, check {cache_menu}.
$cache = cache_get($cid, 'cache_menu');
if ($cache && isset($cache->data)) {
// If the cache entry exists, it contains the parameters for
// menu_build_tree().
$tree_parameters = $cache->data;
}
// If the tree data was not in the cache, build $tree_parameters.
if (!isset($tree_parameters)) {
$tree_parameters = array(
'min_depth' => 1,
'max_depth' => $max_depth,
);
if ($mlid) {
// The tree is for a single item, so we need to match the values in its
// p columns and 0 (the top level) with the plid values of other links.
$parents = array(
0,
);
for ($i = 1; $i < MENU_MAX_DEPTH; $i++) {
if (!empty($link["p{$i}"])) {
$parents[] = $link["p{$i}"];
}
}
$tree_parameters['expanded'] = $parents;
$tree_parameters['active_trail'] = $parents;
$tree_parameters['active_trail'][] = $mlid;
}
// Cache the tree building parameters using the page-specific cid.
cache_set($cid, $tree_parameters, 'cache_menu');
}
// Build the tree using the parameters; the resulting tree will be cached
// by _menu_build_tree()).
$tree[$cid] = menu_build_tree($menu_name, $tree_parameters);
}
return $tree[$cid];
}