CodeIgniter教程:文件上传
使用文件上传类,我们可以方便地上传文件,也可以限制上传文件的类型和大小等。根据下面的例子显示的步骤来理解CodeIgniter中的文件上传过程。
例子
复制下面的代码并存储在application/view/Upload_form.php。
<html> <head> <title>Upload Form</title> </head> <body> <?php echo $error;?> <?php echo form_open_multipart('upload/do_upload');?> <form action = "" method = ""> <input type = "file" name = "userfile" size = "20" /> <br /><br /> <input type = "submit" value = "upload" /> </form> </body> </html>
复制下面给出的代码,并将其存储在application/view/Upload_success.php
<html> <head> <title>Upload Form</title> </head> <body> <h3>Your file was successfully uploaded!</h3> <ul> <?phpforeach ($upload_data as $item => $value):?> <li><?php echo $item;?>: <?php echo $value;?></li> <?phpendforeach; ?> </ul> <p><?php echo anchor('upload', 'Upload Another File!'); ?></p> </body> </html>
复制下面给出的代码,并将其存储在application/controllers/Upload.php中。在CodeIgniter项目的根目录下创建uploads文件夹,即网站的根目录。
<?php class Upload extends CI_Controller { public function __construct() { parent::__construct(); $this->load->helper(array('form', 'url')); } public function index() { $this->load->view('upload_form', array('error' => ' ' )); } public function do_upload() { $config['upload_path'] = './uploads/'; $config['allowed_types'] = 'gif|jpg|png'; $config['max_size'] = 100; $config['max_width'] = 1024; $config['max_height'] = 768; $this->load->library('upload', $config); if ( ! $this->upload->do_upload('userfile')) { $error = array('error' => $this->upload->display_errors()); $this->load->view('upload_form', $error); } else { $data = array('upload_data' => $this->upload->data()); $this->load->view('upload_success', $data); } } } ?>
在application/config/routes.php文件的末尾添加以下行。
$route['upload'] = 'Upload';
现在让我们通过访问浏览器中的以下网址来执行这个示例。用你的网址替换yoursite.com。
http://yoursite.com/index.php/upload
它将显示以下内容
成功上传文件后,您将看到以下内容