yii实现图片上传及缩略图生成的方法

2020-03-22 19:56:52

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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
*/
html' target='_blank'>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。PHP教程

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