CI(4) 文件上传

controller:

		public function uploads()
		{
			if($_POST['sub'])
			{
				$config['upload_path'] = './application/uploads'; //同理 都是以 index.php 为主入口
				$config['allowed_types'] = 'jpg|jpeg|png|gif';
				$config['max_size'] = 1024;//1M
				$this->load->library('upload',$config);
				if(!$this->upload->do_upload()) //上传失败
				{
					$error = $this->upload->display_errors();
					echo $error;
				}
				else //上传成功
				{
					$data = $this->upload->data();
					var_dump($data);
				}
			}
		}

view

注意 必须在controller中加载 helper 才能使用 form_open_multipart()函数

		public function __construct()
		{
			parent::__construct();
			$this->load->helper(array('form','url'));
		}