1、form头部信息的主动输出函数(view)
<?php
$attributes = array("class" => "email", "id" => "myform");
echo form_open("email/send", $attributes);
//上面一行代码输出：
//<form method="post" accept-charset="utf-8" action="https://example.com/index.php/email/send" id="myform" class="email"/>
/*
* form_open_multipart()
* 函数用法同上，加上了文件上传的信息 上传方法默以为post
*/
?><?php
$attributes = ar
