$category_tree,
* 'open_path' => [1 ,2]
* ]);
*
* -----------------------------------------------------------------------------
*/
/** tree_ul
* creates (recursively) a nested ul-li tree of categories
* --- -- -- - - -
* @param $tree (array) : categories array formated as tree
* @param $open_nodes (array) : array of categor ids that shall be marked open/selected
* @return $html (string)
*/
function tree_li($tree, $open_nodes = [], $l = 0)
{
$html = "";
foreach($tree as $node) {
// if has childs ...
// write li ; traverse children recursively
if ((isset($node['childs'])) && ( $node['childs']!= [])) {
if (in_array(intval($node['rec']['id']), $open_nodes)) {
$inner_class = "inner show";
$sign = "–";
$a_class = "has-childs selected";
} else {
$inner_class = "inner";
$sign = "+";
$a_class = "has-childs";
}
$html .= "
{$node['rec']['label']}
{$sign}
"
. tree_li($node['childs'], $open_nodes, $l+1)
."
";
} else { // else just write the li
if (in_array(intval($node['rec']['id']), $open_nodes)) {
$u_in = "";
$u_out = "";
$a_class = "selected";
} else {
$u_in = "";
$u_out = "";
$a_class = "";
}
$html .= "
{$node['rec']['label']}
";
}
}
return $html;
}
// draw the menu (hidden on XS screens)
// -----------------------------------------------------------------------------
echo "Διαθέσιμη ύλη
";
echo "". tree_li($categories, $open_path) ."
";
// TODO:
// draw menu for XS screens (for example, just the 1st-level categories)
// (maybe in an accordion so it won;t take too much area on small screens)