yii图片上传

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

首先感谢这里的博主，提供了思路，不过在调用 $model->b_image->extensionName 这个时，总提示错误，调呀调的，调烦了，就自己写一个吧。

其他不多说，看步骤

一、下载yii官方提供的图片处理扩展 http://www.yiiframework.com/extension/image 具体配置跟官方的一样，这个扩展提供了两套调用方式，我选择了第一种，就是在配置文件里进行添加组件的方式，来张图，有图有真象哈

二、在protected目录下新建一utils目录，在目录下新建Upload.php文件，代码如下

<?php
/**
 * @desc 对后台上传的图片进行简单处理
 * @author Debm!
 * @param $name 原图片名称
 * @param $type 判断mime值
 * @param $tmp_name 临时位置,转换目录使用
 * @param $width 新图宽
 * @param $height 新图高
 * @return string path 存放路径
 */
class Upload
{
	public static function createImageLink($name, $type, $tmp_name, $width, $height){
		$imageMime = array(
			'image/gif',
			'image/jpeg',
			'image/bmp',
			//需要时添加...
		);
		if(!in_array($type, $imageMime)){
			return false;
		}else{
			//获取图片后缀
			$imageExt = end(explode('.', $name));
			//以当前时间命名此图片，避免重复
			$name = time().uniqid().'.'.$imageExt;
			//创建存放路径
			$path = Yii::app()->request->baseUrl.'images/uploads/'.$name;
			//图片处理
			$image = Yii::app()->image->load($tmp_name);
			$image->resize($width, $height)->rotate(0)->quality(100)->sharpen(20);
			$image->save($path);
			// move_uploaded_file($tmp_name,$path);
			return $path;
		}
	}
}

三、在 protected/config/main.php 这个文件里，把刚才的utils目录载入

'import'=>array(
'application.models.*',
'application.components.*',
'application.extensions.*',
'application.helpers.*',
'application.utils.*',
'application.modules.boss.modules.srbac.controllers.SBaseController',
),

四、写代码

model部分

添加图片验证规则，其他规则根据自己需要进行添加，这里我只添加需要展示的代码(views和controller一样，不再说明了)

public function rules()
	{
		return array(
			array('b_image', 'file', 'types' => 'jpg,gif,png', 'on' => 'insert'),
		);
	}

views

<?php $form=$this->beginWidget('CActiveForm', array(
'id'=>'iot-books-form',
// Please note: When you enable ajax validation, make sure the corresponding
// controller action is handling ajax validation correctly.
// There is a call to performAjaxValidation() commented in generated controller code.
// See class documentation of CActiveForm for details on this.
'enableAjaxValidation'=>false,
'htmlOptions'=>array('enctype'=>'multipart/form-data'),//这个一定要加，否则获取不到图片
)); ?>

<div class="row">
		<?php echo $form->labelEx($model,'b_image'); ?>
		<?php
			if(!$model->isNewRecord){
				?>
				<img src="<?php echo Yii::app()->request->baseUrl.'/'.$model->b_image; ?>">
				<?php
			}
		?>
		<?php echo CHtml::activeFileField($model,'b_image',array('size'=>60,'maxlength'=>255)); ?>
		<?php echo $form->error($model,'b_image'); ?>
	</div>

controller

/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate()
	{
		$model=new IotBooks;

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

		if(isset($_POST['IotBooks']))
		{
			$imgUrl = '';
			if($_FILES){
				$name = $_FILES['IotBooks']['name']['b_image']; //上传图片原名
				$type = $_FILES['IotBooks']['type']['b_image']; //上传图片mime类型
				$tmp_name = $_FILES['IotBooks']['tmp_name']['b_image']; //上传图片临时存放位置
				$width = 100; //缩略图宽
				$height = 100; //缩略图高
				$imgUrl = Upload::createImageLink($name, $type, $tmp_name, $width, $height);
			}
			$model->attributes = $_POST['IotBooks'];
			$model->b_image = $imgUrl;
			if($model->save())
				$this->redirect(array('view','id'=>$model->bid));
		}
		$this->render('create',array(
			'model'=>$model,
		));
	}

	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 * @param integer $id the ID of the model to be updated
	 */
	public function actionUpdate($id)
	{
		$model=$this->loadModel($id);

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

		if(isset($_POST['IotBooks']))
		{	
			$imgUrl = $model->b_image;
			if($_FILES && ($_FILES['IotBooks']['name']['b_image'] != '')){
				$name = $_FILES['IotBooks']['name']['b_image']; //上传图片原名
				$type = $_FILES['IotBooks']['type']['b_image']; //上传图片mime类型
				$tmp_name = $_FILES['IotBooks']['tmp_name']['b_image']; //上传图片临时存放位置
				$width = 100; //缩略图宽
				$height = 100; //缩略图高
				$imgUrl = Upload::createImageLink($name, $type, $tmp_name, $width,$height);
			}
			$model->attributes = $_POST['IotBooks'];
			$model->b_image = $imgUrl;
			if($model->save())
				$this->redirect(array('view','id'=>$model->bid));
		}

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

完工了，试一下吧