1

 <?php
-namespace App\Mail\lib;
+namespace Helper\Mail;
 
+
+use Illuminate\Support\Facades\Storage;
 use PHPMailer\PHPMailer\PHPMailer;
 use PHPMailer\PHPMailer\SMTP;
 
@@ -12,43 +14,6 @@ use PHPMailer\PHPMailer\SMTP;
  */
 class MailFun {
 
-    /**
-     * 列表 转 树数据
-     * @param $list
-     * @param string $pk
-     * @param string $pid
-     * @param string $child
-     * @param int $root
-     * @param bool $empty_child
-     * @return array
-     * @time 2022/8/1 16:05
-     */
-    public static function list2Tree($list, $pk='id',$pid = 'pid',$child = '_child',$root=0, $empty_child=true) {
-        // 创建Tree
-        $tree = array();
-        if(is_array($list)) {
-            // 创建基于主键的数组引用
-            $refer = array();
-            foreach ($list as $key => $data) {
-                if($empty_child){
-                    $list[$key][$child] =   [];
-                }
-                $refer[$data[$pk]] = &$list[$key];
-            }
-            foreach ($list as $key => $data) {
-                // 判断是否存在parent
-                $parentId = $data[$pid];
-                if ($root == $parentId) {
-                    $tree[] = &$list[$key];
-                }else{
-                    if (isset($refer[$parentId])) {
-                        $refer[$parentId][$child][] =   &$list[$key];
-                    }
-                }
-            }
-        }
-        return $tree;
-    }
 
     /**
      * json encode