thinkphp5.1 把图片路径转换成文件格式传给后台

$param = array(\'token\'=>\'f7463452qt8ks4546\',\'sid\'=>$sid,\'tel\'=>$params[\'phone\'],\'name\'=>$params[\'prize_name\'],\'address\'=>$params[\'mailing_address\'],\'template\'=>new \\CurlFile($_SERVER[\'DOCUMENT_ROOT\'].$templateUrls),\'license\'=>new \\CurlFile($_SERVER[\'DOCUMENT_ROOT\'].$licenseUrls),    //里面是绝对路径);