PHP MySql: Print Tree - Parent Child Checkbox

Question

I have This MySql table for put multiple news categories(parent/child) :

ID  |   NAME    |  PARENTID  | DESC |
 1  |   LINUX   |     0      | NULL |         


        

Answer 1

Use recursion! Note: the code below is not safe for cyclic graphs (nodes may not be ancestors of themselves)!

printChildren($items,0);
function printChildren(array $items, $parentId){
    foreach($items as $item){
        if($item['parent']==$parentId){
            print '<li>';
            print $item['label']; //or whatever you want about the current node
            print '<ul>';
            printChildren($items, $item['id']);
            print '</ul></li>';
        }
    }
}