codeigniter资料图片上传

$config['upload_path'] = './uploads/'; // 上传文件保存的路径
$config['allowed_types'] = 'gif|jpg|png'; // 允许上传的文件类型
$config['max_size'] = 2048; // 最大文件大小（单位：KB）

<form method="post" action="upload_controller/upload" enctype="multipart/form-data">
    <input type="file" name="userfile" />
    <input type="submit" value="上传" />
</form>

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

    public function upload() {
        $this->load->library('upload', $this->config->item('upload_path'));
        
        if (!$this->upload->do_upload('userfile')) {
            $error = array('error' => $this->upload->display_errors());
            // 处理上传失败的情况
        } else {
            $data = array('upload_data' => $this->upload->data());
            // 处理上传成功的情况
        }
    }
}

<?php if (isset($upload_data)) { ?>
    <h3>上传成功！</h3>
    <img src="<?php echo base_url('uploads/' . $upload_data['file_name']); ?>" />
<?php } elseif (isset($error)) { ?>
    <h3>上传失败！</h3>
    <p><?php echo $error; ?></p>
<?php } ?>