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yii 图片上传 图片处理

用yii自带的CUploadfile进行图片的上传,因为这个类只提供上传的功能,并没有图片的处理功能比如图片的缩减、锐化、旋转等,所以必须借助yii的扩展image来实现。

一、图片上传

数据表:

CREATE TABLE `img_show` (  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,  `title` varchar(150) DEFAULT NULL,  `url` varchar(100) DEFAULT NULL,  `img_path` varchar(150) DEFAULT NULL,  `handle_img_path` varchar(150) DEFAULT NULL,  `add_time` int(11) DEFAULT NULL,  PRIMARY KEY (`id`)) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=utf8

用gii生成对应的model、curd和controller,更改如下:

model:

public function rules()    {        // NOTE: you should only define rules for those attributes that        // will receive user inputs.        return array(            array(add_time, numerical, integerOnly=>true),            array(title, img_path, handle_img_path, length, max=>150),            array(url, length, max=>100),            array(‘img_path‘,                ‘file‘,    //定义为file类型                //  ‘allowEmpty‘=>true,                ‘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!‘            ),            // The following rule is used by search().            // @todo Please remove those attributes that should not be searched.            array(id, title, url, img_path, handle_img_path, add_time, safe, on=>search),        );    }

controller:

public function actionCreate()    {        $model=new ImgShow;        if(isset($_POST[ImgShow]))        {            $model->attributes=$_POST[ImgShow];            $model->add_time = time();            //获取一个CUploadfile的实例            $file = CUploadedFile::getInstance($model,‘img_path‘);            //判断实例化是否成功 将图片重命名            if(is_object($file)&&get_class($file) === ‘CUploadedFile‘){                $model->img_path = ‘./images/upfile/file‘.time().‘_‘.rand(0,9999).‘.‘.$file->extensionName;                $file->saveAs($model->img_path);            }            //对图片进行处理           /* $image = Yii::app()->image->load($model->img_path);            $image->resize(600, 300)->rotate(-45)->quality(75)->sharpen(20);            $model->handle_img_path = ‘./images/upfile/file‘.time().‘_‘.rand(0,9999).‘_small‘.‘.‘.$file->extensionName;            $image->save($model->handle_img_path);*/            if($model->save())                $this->redirect(array(view,id=>$model->id));        }        $this->render(create,array(            model=>$model,        ));    }

views:

<div class="form"><?php $form=$this->beginWidget(CActiveForm, array(    id=>img-show-form,    enableAjaxValidation=>false,    ‘htmlOptions‘=>array(‘enctype‘=>‘multipart/form-data‘),)); ?>    <p>字段带<span class="required">*</span> 的为必填项.</p>    <?php echo $form->errorSummary($model); ?>    <div class="row">        <?php echo $form->labelEx($model,title); ?>        <?php echo $form->textField($model,title,array(size=>60,maxlength=>150)); ?>        <?php echo $form->error($model,title); ?>    </div>    <div class="row">        <?php echo $form->labelEx($model,url); ?>        <?php echo $form->textField($model,url,array(size=>60,maxlength=>100)); ?>        <?php echo $form->error($model,url); ?>    </div>    <div class="row">        <?php echo $form->labelEx($model,img_path); ?><!--        --><?php //echo $form->textField($model,‘img_path‘,array(‘size‘=>60,‘maxlength‘=>150)); ?>        <?php echo CHtml::activeFileField($model,‘img_path‘,array(‘size‘=>60,‘maxlength‘=>255)); ?>        <?php echo $form->error($model,img_path); ?>    </div>    <!--<div class="row">        <?php /*echo $form->labelEx($model,‘handle_img_path‘); */?>        <?php /*echo $form->textField($model,‘handle_img_path‘,array(‘size‘=>60,‘maxlength‘=>150)); */?>        <?php /*echo $form->error($model,‘handle_img_path‘); */?>    </div>-->    <!--<div class="row">        <?php /*echo $form->labelEx($model,‘add_time‘); */?>        <?php /*echo $form->textField($model,‘add_time‘); */?>        <?php /*echo $form->error($model,‘add_time‘); */?>    </div>-->    <div class="row buttons">        <?php echo CHtml::submitButton($model->isNewRecord ? 新增 : 更新); ?>    </div><?php $this->endWidget(); ?></div><!-- form -->

在protect目录下新建文件夹:images/upfile   这样就可以上传图片了。

二、图片处理

下载image扩展:http://www.yiiframework.com/extension/image#hh1

按其文档进行相应的配置,将解压后后的文件夹image放在exetension下,将helper放在protected下,在main.php中配置如下:

 import=>array(        application.models.*,        application.components.*,        ‘application.helpers.*‘,    ),    // application components    components=>array(                ‘image‘=>array(            ‘class‘=>‘application.extensions.image.CImageComponent‘,                // GD or ImageMagick            ‘driver‘=>‘GD‘,                // ImageMagick setup path            ‘params‘=>array(‘directory‘=>‘/opt/local/bin‘),            ),

 

配置完毕后,打开上面controller下的红色的注释部分,这样就可以对图片进行处理了。