PHP $_FILES中error返回值详解

$_files['file']['error']值

upload_err_ok: 0 //正常，上传成功

upload_err_ini_size: 1 //上传文件大小超过服务器允许上传的最大值，php.ini中设置upload_max_filesize选项限制的值

upload_err_form_size: 2 //上传文件大小超过html表单中隐藏域max_file_size选项指定的值

upload_err_no_tmp_dir: 6 //没有找不到临时文件夹

upload_err_cant_write: 7 //文件写入失败

upload_err_extension: 8 //php文件上传扩展没有打开

upload_err_partial: 3 //文件只有部分被上传

switch($_files[$field]['error']) {  

    case 1:   
        // 文件大小超出了服务器的空间大小   
        $this->seterror("the file is too large (server).");   
break;   

case 2:   
        // 要上传的文件大小超出浏览器限制   
        $this->seterror("the file is too large (form).");   
        break;   

    case 3:   
        // 文件仅部分被上传   
        $this->seterror("the file was only partially uploaded.");   
        break;   

    case 4:   
        // 没有找到要上传的文件   
        $this->seterror("no file was uploaded.");   
        break;   

    case 5:   
        // 服务器临时文件夹丢失   
        $this->seterror("the servers temporary folder is missing.");   
        break;   

    case 6:   
        // 文件写入到临时文件夹出错   
        $this->seterror("failed to write to the temporary folder.");   
        break;   
}