Function output problem, output is uncontrolled.

Question

function generateTree($items)
 {       
 $items = Db::name('tree')->column('id,pid,name');        
$tree = array();        
foreach ($items as $item) {
    if (isset($items[$item['pid']])) { 
       $items[$item['pid']]['son'][] = &$items[$item['id']];
        } else { 
        $tree[] = &$items[$item['id']]; 
       } 
       } 
       return $tree; 
       }
       $tree = generateTree(0); 
  function getTreeData($tree)
      { 
       foreach ($tree as $t) {
        echo "<li><span><i " . "class=\"icon-minus-sign\"></i>" .$t["name"]. "</span>\n<a href=\"info.php?id=".$t["id"]."\" target=\"_blank\">详细</a><ul>\n"; 
      if (isset($t['son'])) {
                getTreeData($t['son']);
             } 
             echo "</ul>\n</li>\n"; 
            } 
        } 
        $list = getTreeData($tree);
        $this->assign('list',$list);    
    return $this->view->fetch();
 }

The static file is like this

is directly output to

and is out of control. If you use variables

Only output one level, and there will be no more after that.

Masters, please teach me how to write, thank you.

Answer 1

You are not out of control, this function echoes, just delete the echo, and the array is returned directly with variables

Splice directly in the view

Answer 2

Don’t write anything on the page, just print the variables transferred from the controller to see what they are