CUploadedFile

包	system.web
继承	class CUploadedFile » CComponent
源自	1.0
版本	$Id: CUploadedFile.php 3515 2011-12-28 12:29:24Z mdomba $
源码	framework/web/CUploadedFile.php

CUploadedFile represents the information for an uploaded file.

Call getInstance to retrieve the instance of an uploaded file, and then use saveAs to save it on the server. You may also query other information about the file, including name, tempName, type, size and error.

公共属性

隐藏继承属性

属性	类型	描述	定义在
error	integer	Returns an error code describing the status of this file uploading.	CUploadedFile
extensionName	string	the file extension name for name.	CUploadedFile
hasError	boolean	whether there is an error with the uploaded file.	CUploadedFile
name	string	the original name of the file being uploaded	CUploadedFile
size	integer	the actual size of the uploaded file in bytes	CUploadedFile
tempName	string	the path of the uploaded file on the server.	CUploadedFile
type	string	the MIME-type of the uploaded file (such as "image/gif").	CUploadedFile

方法一：

实现上传文件，要用到MVC三个层面。

1、模型层面 M （User.php），把一个字段在rules方法里设置为 file 属性。

            array('url',
                'file',    //定义为file类型
                'allowEmpty'=>false, 
                'types'=>'jpg,png,gif,doc,docx,pdf,xls,xlsx,zip,rar,ppt,pptx',   //上传文件的类型
                'maxSize'=>1024*1024*10,    //上传大小限制，注意不是php.ini中的上传文件大小
                'tooLarge'=>'文件大于10M，上传失败！请上传小于10M的文件！'
            ),
            //array('imgpath','file','types'=>'jpg,gif,png','on'=>'insert'),
            array('addtime', 'length', 'max'=>10),

2、视图层View（upimg.php），这里需要用到CHtml::activeFileField 来生成选择文件的button，注意是上传文件，所以在该标单中enctype应该设置为： multupart/form-data

详见：http://www.yiichina.com/api/CHtml#activeFileField-detail

<?php $form=$this->beginWidget('CActiveForm', array(
    'id'=>'link-form',
    'enableAjaxValidation'=>false,
    /**
     * activeFileField()方法为一个模型属性生成一个文件输入框。
     * 注意，你必须设置表单的‘enctype’属性为‘multipart/form-data’。
     * 表单被提交后，上传的文件信息可以通过$_FILES[$name]来获得 (请参阅 PHP documentation).
     */
    'htmlOptions' => array('enctype'=>'multipart/form-data'),
)); ?>

    <div class="row">
        <?php echo $form->labelEx($model,'url'); ?>
        <?php if($model->url){ echo '<img src="/'.$model->url.'" width="20%"/>';} ?>
        <?php echo CHtml::activeFileField($model,'url'); ?>
        <?php echo $form->error($model,'url'); ?>
    </div>

    <div class="row buttons">
        <?php echo CHtml::submitButton('上传'); ?>
    </div>
<?php $this->endWidget(); ?>

3、控制层 C（UserController.php）

    //图片上传测试页面
    public function actionUpimg()
    {
        $model = new User;

        // Uncomment the following line if AJAX validation is needed
        // $this->performAjaxValidation($model);

        if (isset($_POST['User'])) {
            $model->attributes = $_POST['User'];
            $file = CUploadedFile::getInstance($model, 'url'); //获得一个CUploadedFile的实例
            //if (is_object($file) && get_class($file) === 'CUploadedFile') { // 判断实例化是否成功
            if ($file) { // 判断实例化是否成功
                $newimg = 'url_' . time() . '_' . rand(1, 9999) . '.' . $file->extensionName;
                //根据时间戳和随机数重命名文件名，extensionName是获取文件的扩展名
                $file->saveAs('assets/uploads/user/' . $newimg); // 上传图片
                $model->url = 'assets/uploads/user/' . $newimg;
            }
            $model->addtime = time();

            if ($model->save()){
                $this->redirect(array('view', 'id' => $model->id)); 
            }
        }

        $this->render('upimg', array('model' => $model, ));
    }

方法二：

在protectedcomponents下新建UploadImg.php文件：

<?php
/**
 * 图片上传类，也可上传其它类型的文件
 * 
 * @author 
 */
class UploadImg
{
    public static function createFile($upload, $type, $act, $imgurl = '')
    {
        //更新图片
        if (!empty($imgurl) && $act === 'update') {
            $deleteFile = Yii::app()->basePath . '/../' . $imgurl;
            if (is_file($deleteFile))
                unlink($deleteFile);
        }
        
        //上传图片
        $uploadDir = Yii::app()->basePath . '/../uploads/' . $type . '/' . date('Y-m', time());
        self::recursionMkDir($uploadDir);
        //根据时间戳和随机数重命名文件名，extensionName是获取文件的扩展名
        $imgname = time() . '-' . rand() . '.' . $upload->extensionName;
        //图片存储路径
        $imageurl = '/uploads/' . $type . '/' . date('Y-m', time()) . '/' . $imgname;
        //存储绝对路径
        $uploadPath = $uploadDir . '/' . $imgname;
        if ($upload->saveAs($uploadPath)) {
            return $imageurl;
        } else {
            return false;
        }
    }
    
    //创建目录
    private static function recursionMkDir($dir)
    {
        if (!is_dir($dir)) {
            if (!is_dir(dirname($dir))) {
                self::recursionMkDir(dirname($dir));
                mkdir($dir, '0777');
            } else {
                mkdir($dir, '0777');
            }
        }
    }
}

控制层 C（UserController.php）改为：

    //图片上传测试页面
    public function actionUpimg()
    {
        $model = new User;
        
        if (isset($_POST['User'])) {
            $model->attributes = $_POST['User'];
            $upload = CUploadedFile::getInstance($model, 'url'); //获得一个CUploadedFile的实例
            if ($upload) { // 判断实例化是否成功
                $model->url = UploadImg::createFile($upload, 'User', 'upimg');    
            } 
            
            $model->addtime = time();   

            if ($model->save()) {
                $this->redirect(array('view', 'id' => $model->id));
            }
        }
        $this->render('upimg', array('model' => $model, ));
    }

参考页面：

http://blog.csdn.net/littlebearwmx/article/details/8573102

http://wuhai.blog.51cto.com/blog/2023916/953300

http://blog.sina.com.cn/s/blog_7522019b01014zno.html

http://hi.baidu.com/32641469/item/a25a3e16334232cd39cb30bc

http://seo.njxzc.edu.cn/seo650