yii实现图片上传及缩略图生成的方法

前端技术 2023/09/09 PHP

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:

复制代码 代码如下:
<?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:

复制代码 代码如下:
<?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

复制代码 代码如下:
<?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：

复制代码 代码如下:
<?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。

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