yii实现图片上传及缩略图生成的方法

本文实例讲述了利用yii框架来实现图片上传功能并在上传成功之后自动生成缩略图的方法，分享给大家供大家参考。具体实现方法如下：

Action文件:

<?php

/**

 * TestController.php

 * Created on: 2014-1-26 12:59:36 by Outsider

 */

class TestController extends CController {

 

    /**

     * 缩略图片生成

     * @ path 图片路径

     * @ width 图片宽度

     * @ height 图片高度

     */

    public function actionGetThumb($path, $w, $h) {

        $file_name = md5($path . $w . $h);

        if (file_exists('./temp/' . $file_name . '.jpg')) {

            header('location:/temp/' . $file_name . '.jpg');

            Yii::app()->end();

        }

        Yii::import("ext.EPhpThumb.EPhpThumb");

        $thumb = new EPhpThumb();

        $thumb->init();

        $thumb->create('.' . $path)

                ->adaptiveResize($w, $h)

                ->save('./temp/' . $file_name . '.jpg')

                ->show();

    }

 

    /*

     * 图片显示

     */

 

    public function actionList() {

        $attache = Attache::model();

        $list = $attache->findAll();

        $this->render('list', array('list' => $list));

        die;

    }

 

    /**

     * 文件上传

     */

    public function actionIndex() {

        $path = getcwd() . 'uploads';

        $dir = DIRECTORY_SEPARATOR . date('Y') . DIRECTORY_SEPARATOR . date('m');

        $dir = str_replace("\", "/", $dir);

        $uploads_dir = str_replace("\", "/", $path . $dir);

        if (!is_dir($uploads_dir) || !is_writeable($uploads_dir)) {

            mkdir($uploads_dir, 0777, TRUE);

            touch($uploads_dir . '/index.html');

        }

        $uploaded = false;

        $model = new Upload();

        if (isset($_POST['Upload'])) {

            $model->attributes = $_POST['Upload'];

            $file = CUploadedFile::getInstance($model, 'file');

            $newName = substr(md5($file->extensionName . round((microtime(true) * 1000))), 0, 17) . '.' . $file->extensionName; 

            $file_name = $uploads_dir . '/' . $newName;

            if ($model->validate()) {

                $attache = new Attache();

                $uploaded = $file->saveAs($file_name, TRUE);

                $attache->name = $file->getName();

                $attache->path = $dir . '/' . $newName;

                $attache->create_time = time();

                $attache->save();

            }

        }

 

        $this->render('index', array(

            'model' => $model,

            'uploaded' => $uploaded,

            'dir' => $uploads_dir,

        ));

    }

}

Upload.php:

<?php

class Upload extends CFormModel {

 

    public $file;

 

    public function rules() {

        return array(

            array('file', 'file', 'types' => 'jpg, gif, png,zip'),

        );

    }

}

图片显示页面：

自定义图片大小，缩略图自动生成

<?php

/**

 * list.php

 * Created on: 2014-1-26 13:12:01 by Outsider

 */

?>

<?php foreach ($list as $v): ?>

    <img src="<?php echo Yii::app()->createUrl('test/getThumb', array('path' => '/uploads' . $v['path'], 'w' => '150', 'h' => '150')) ?>">

<?php endforeach; ?>

图片上传表单：

<?php if($uploaded):?>

<p>File was uploaded. Check <?php echo $dir?>.</p>

<?php endif ?>

<?php echo CHtml::beginForm('','post',array

        ('enctype'=>'multipart/form-data'))?>

    <?php echo CHtml::error($model, 'file')?>

    <?php echo CHtml::activeFileField($model, 'file')?>

    <?php echo CHtml::submitButton('Upload')?>

<?php echo CHtml::endForm()?>

希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。