thinkphp3.2.2有预览的多图上传

thinkphp3.2.2有预览的多图上传

整体思路

1 封装文件上传和图片上传的类文件

2 视图中添加相关JS和表单提交

3 控制器中添加上传文件的相关代码

一 2个class 文件 请上传到/ThinkPHP/Library/Think/

UploadFile.class.php

<?php
namespace Think;
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: UploadFile.class.php 2568 2012-01-10 12:15:45Z liu21st $

/**
 +------------------------------------------------------------------------------
 * 文件上传类
 +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Net
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: UploadFile.class.php 2568 2012-01-10 12:15:45Z liu21st $
 +------------------------------------------------------------------------------
 */
class UploadFile {//类定义开始

    // 上传文件的最大值
    public $maxSize = -1;

    // 是否支持多文件上传
    public $supportMulti = true;

    // 允许上传的文件后缀
    //  留空不作后缀检查
    public $allowExts = array();

    // 允许上传的文件类型
    // 留空不做检查
    public $allowTypes = array();

    // 使用对上传图片进行缩略图处理
    public $thumb   =  false;
    // 图库类包路径
    public $imageClassPath = 'Think.UploadImage';
    // 缩略图最大宽度
    public $thumbMaxWidth;
    // 缩略图最大高度
    public $thumbMaxHeight;
    // 缩略图前缀
    public $thumbPrefix   =  'thumb_';
    public $thumbSuffix  =  '';
    // 缩略图保存路径
    public $thumbPath = '';
    // 缩略图文件名
    public $thumbFile       =   '';
    // 是否移除原图
    public $thumbRemoveOrigin = false;
    // 压缩图片文件上传
    public $zipImages = false;
    // 启用子目录保存文件
    public $autoSub   =  false;
    // 子目录创建方式 可以使用hash date
    public $subType   = 'hash';
    public $dateFormat = 'Ymd';
    public $hashLevel =  1; // hash的目录层次
    // 上传文件保存路径
    public $savePath = '';
    public $autoCheck = true; // 是否自动检查附件
    // 存在同名是否覆盖
    public $uploadReplace = false;

    // 上传文件命名规则
    // 例如可以是 time uniqid com_create_guid 等
    // 必须是一个无需任何参数的函数名 可以使用自定义函数
    public $saveRule = '';

    // 上传文件Hash规则函数名
    // 例如可以是 md5_file sha1_file 等
    public $hashType = 'md5_file';

    // 错误信息
    private $error = '';

    // 上传成功的文件信息
    private $uploadFileInfo ;

    /**
     +----------------------------------------------------------
     * 架构函数
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     */
    public function __construct($maxSize='',$allowExts='',$allowTypes='',$savePath='',$saveRule='') {
        if(!empty($maxSize) && is_numeric($maxSize)) {
            $this->maxSize = $maxSize;
        }
        if(!empty($allowExts)) {
            if(is_array($allowExts)) {
                $this->allowExts = array_map('strtolower',$allowExts);
            }else {
                $this->allowExts = explode(',',strtolower($allowExts));
            }
        }
        if(!empty($allowTypes)) {
            if(is_array($allowTypes)) {
                $this->allowTypes = array_map('strtolower',$allowTypes);
            }else {
                $this->allowTypes = explode(',',strtolower($allowTypes));
            }
        }
        if(!empty($saveRule)) {
            $this->saveRule = $saveRule;
        }else{
            $this->saveRule  =   C('UPLOAD_FILE_RULE');
        }
        $this->savePath = $savePath;
    }

    /**
     +----------------------------------------------------------
     * 上传一个文件
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param mixed $name 数据
     * @param string $value  数据表名
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     * @throws ThinkExecption
     +----------------------------------------------------------
     */
    private function save($file) {
        $filename = $file['savepath'].$file['savename'];
        if(!$this->uploadReplace && is_file($filename)) {
            // 不覆盖同名文件
            $this->error =   '文件已经存在！'.$filename;
            return false;
        }
        // 如果是图像文件 检测文件格式
        if( in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png','swf')) && false === getimagesize($file['tmp_name'])) {
            $this->error = '非法图像文件';
            return false;
        }
        if(!move_uploaded_file($file['tmp_name'], $this->autoCharset($filename,'utf-8','gbk'))) {
            $this->error = '文件上传保存错误！';
            return false;
        }
        if($this->thumb && in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png'))) {
            $image =  getimagesize($filename);
            if(false !== $image) {
                //是图像文件生成缩略图
                $thumbWidth     =   explode(',',$this->thumbMaxWidth);
                $thumbHeight        =   explode(',',$this->thumbMaxHeight);
                $thumbPrefix        =   explode(',',$this->thumbPrefix);
                $thumbSuffix = explode(',',$this->thumbSuffix);
                $thumbFile          =   explode(',',$this->thumbFile);
                $thumbPath    =  $this->thumbPath?$this->thumbPath:$file['savepath'];
                // 生成图像缩略图
                import($this->imageClassPath);
                $realFilename  =  $this->autoSub?basename($file['savename']):$file['savename'];
                for($i=0,$len=count($thumbWidth); $i<$len; $i++) {
                    $thumbname  =   $thumbPath.$thumbPrefix[$i].substr($realFilename,0,strrpos($realFilename, '.')).$thumbSuffix[$i].'.'.$file['extension'];
                    UploadImage::thumb($filename,$thumbname,'',$thumbWidth[$i],$thumbHeight[$i],true);
                }
                if($this->thumbRemoveOrigin) {
                    // 生成缩略图之后删除原图
                    unlink($filename);
                }
            }
        }
        if($this->zipImags) {
            // TODO 对图片压缩包在线解压

        }
        return true;
    }

    /**
     +----------------------------------------------------------
     * 上传所有文件
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $savePath  上传文件保存路径
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     * @throws ThinkExecption
     +----------------------------------------------------------
     */
    public function upload($savePath ='') {
        //如果不指定保存文件名，则由系统默认
        if(empty($savePath))
            $savePath = $this->savePath;
        // 检查上传目录
        if(!is_dir($savePath)) {
            // 检查目录是否编码后的
            if(is_dir(base64_decode($savePath))) {
                $savePath   =   base64_decode($savePath);
            }else{
                // 尝试创建目录
                if(!mkdir($savePath)){
                    $this->error  =  '上传目录'.$savePath.'不存在';
                    return false;
                }
            }
        }else {
            if(!is_writeable($savePath)) {
                $this->error  =  '上传目录'.$savePath.'不可写';
                return false;
            }
        }
        $fileInfo = array();
        $isUpload   = false;

        // 获取上传的文件信息
        // 对$_FILES数组信息处理
        $files   =   $this->dealFiles($_FILES);
        foreach($files as $key => $file) {
            //过滤无效的上传
            if(!empty($file['name'])) {
                //登记上传文件的扩展信息
                $file['key']          =  $key;
                $file['extension']  = $this->getExt($file['name']);
                $file['savepath']   = $savePath;
                $file['savename']   = $this->getSaveName($file);

                // 自动检查附件
                if($this->autoCheck) {
                    if(!$this->check($file))
                        return false;
                }

                //保存上传文件
                if(!$this->save($file)) return false;
                if(function_exists($this->hashType)) {
                    $fun =  $this->hashType;
                    $file['hash']   =  $fun($this->autoCharset($file['savepath'].$file['savename'],'utf-8','gbk'));
                }
                //上传成功后保存文件信息，供其他地方调用
                unset($file['tmp_name'],$file['error']);
                $fileInfo[] = $file;
                $isUpload   = true;
            }
        }
        if($isUpload) {
            $this->uploadFileInfo = $fileInfo;
            return true;
        }else {
            $this->error  =  '没有选择上传文件';
            return false;
        }
    }

    //循环创建目录   lish  开放
    /*function mk_dir($dir, $mode = 0755)
    {
        if (is_dir($dir) || @mkdir($dir,$mode)) return true;
        if (!mk_dir(dirname($dir),$mode)) return false;
        return @mkdir($dir,$mode);
    } */

    public function mk_dir($dir, $mode = 0755)
    {
        if (is_dir($dir) || @mkdir($dir,$mode,true)) return true;
        if (!mk_dir(dirname($dir),$mode,true)) return false;
        return @mkdir($dir,$mode,true);
    }
    /**
     +----------------------------------------------------------
     * 上传单个上传字段中的文件 支持多附件
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param array $file  上传文件信息
     * @param string $savePath  上传文件保存路径
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     * @throws ThinkExecption
     +----------------------------------------------------------
     */
    public function uploadOne($file,$savePath=''){
        //如果不指定保存文件名，则由系统默认
        if(empty($savePath))
            $savePath = $this->savePath;
        // 检查上传目录
        if(!is_dir($savePath)) {
            // 尝试创建目录
            if(!mk_dir($savePath)){
                $this->error  =  '上传目录'.$savePath.'不存在';
                return false;
            }
        }else {
            if(!is_writeable($savePath)) {
                $this->error  =  '上传目录'.$savePath.'不可写';
                return false;
            }
        }
        //过滤无效的上传
        if(!empty($file['name'])) {
            $fileArray = array();
            if(is_array($file['name'])) {
               $keys = array_keys($file);
               $count    =   count($file['name']);
               for ($i=0; $i<$count; $i++) {
                   foreach ($keys as $key)
                       $fileArray[$i][$key] = $file[$key][$i];
               }
            }else{
                $fileArray[] =  $file;
            }
            $info =  array();
            foreach ($fileArray as $key=>$file){
                //登记上传文件的扩展信息
                $file['extension']  = $this->getExt($file['name']);
                $file['savepath']   = $savePath;
                $file['savename']   = $this->getSaveName($file);
                // 自动检查附件
                if($this->autoCheck) {
                    if(!$this->check($file))
                        return false;
                }
                //保存上传文件
                if(!$this->save($file)) return false;
                if(function_exists($this->hashType)) {
                    $fun =  $this->hashType;
                    $file['hash']   =  $fun($this->autoCharset($file['savepath'].$file['savename'],'utf-8','gbk'));
                }
                unset($file['tmp_name'],$file['error']);
                $info[] = $file;
            }
            // 返回上传的文件信息
            return $info;
        }else {
            $this->error  =  '没有选择上传文件';
            return false;
        }
    }

    /**
     +----------------------------------------------------------
     * 转换上传文件数组变量为正确的方式
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param array $files  上传的文件变量
     +----------------------------------------------------------
     * @return array
     +----------------------------------------------------------
     */
    private function dealFiles($files) {
       $fileArray = array();
       $n = 0;
       foreach ($files as $file){
           if(is_array($file['name'])) {
               $keys = array_keys($file);
               $count    =   count($file['name']);
               for ($i=0; $i<$count; $i++) {
                   foreach ($keys as $key)
                       $fileArray[$n][$key] = $file[$key][$i];
                   $n++;
               }
           }else{
               $fileArray[$n] = $file;
               $n++;
           }
       }
       return $fileArray;
    }

    /**
     +----------------------------------------------------------
     * 获取错误代码信息
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $errorNo  错误号码
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     * @throws ThinkExecption
     +----------------------------------------------------------
     */
    protected function error($errorNo) {
         switch($errorNo) {
            case 1:
                $this->error = '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值';
                break;
            case 2:
                $this->error = '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值';
                break;
            case 3:
                $this->error = '文件只有部分被上传';
                break;
            case 4:
                $this->error = '没有文件被上传';
                break;
            case 6:
                $this->error = '找不到临时文件夹';
                break;
            case 7:
                $this->error = '文件写入失败';
                break;
            default:
                $this->error = '未知上传错误！';
        }
        return ;
    }

    /**
     +----------------------------------------------------------
     * 根据上传文件命名规则取得保存文件名
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param string $filename 数据
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    private function getSaveName($filename) {
        $rule = $this->saveRule;
        if(empty($rule)) {//没有定义命名规则，则保持文件名不变
            $saveName = $filename['name'];
        }else {
            if(function_exists($rule)) {
                //使用函数生成一个唯一文件标识号
                $saveName = $rule().".".$filename['extension'];
            }else {
                //使用给定的文件名作为标识号
                $saveName = $rule.".".$filename['extension'];
            }
        }
        if($this->autoSub) {
            // 使用子目录保存文件
            $filename['savename'] = $saveName;
            $saveName = $this->getSubName($filename).'/'.$saveName;
        }
        return $saveName;
    }

    /**
     +----------------------------------------------------------
     * 获取子目录的名称
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param array $file  上传的文件信息
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    private function getSubName($file) {
        switch($this->subType) {
            case 'date':
                $dir   =  date($this->dateFormat,time());
                break;
            case 'hash':
            default:
                $name = md5($file['savename']);
                $dir   =  '';
                for($i=0;$i<$this->hashLevel;$i++) {
                    $dir   .=  $name{$i}.'/';
                }
                break;
        }
        if(!is_dir($file['savepath'].$dir)) {

            //mk_dir($file['savepath'].$dir);
            mkdir($file['savepath'].$dir,true); //自己改的  迎合php5.0

        }
        return $dir;
    }

    /**
     +----------------------------------------------------------
     * 检查上传的文件
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param array $file 文件信息
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function check($file) {
        if($file['error']!== 0) {
            //文件上传失败
            //捕获错误代码
            $this->error($file['error']);
            return false;
        }
        //文件上传成功，进行自定义规则检查
        //检查文件大小
        if(!$this->checkSize($file['size'])) {
            $this->error = '上传文件大小不符！';
            return false;
        }

        //检查文件Mime类型
        if(!$this->checkType($file['type'])) {
            $this->error = '上传文件MIME类型不允许！';
            return false;
        }
        //检查文件类型
        if(!$this->checkExt($file['extension'])) {
            $this->error ='上传文件类型不允许';
            return false;
        }

        //检查是否合法上传
        if(!$this->checkUpload($file['tmp_name'])) {
            $this->error = '非法上传文件！';
            return false;
        }
        return true;
    }

    // 自动转换字符集 支持数组转换
    private function autoCharset($fContents, $from='gbk', $to='utf-8') {
        $from = strtoupper($from) == 'UTF8' ? 'utf-8' : $from;
        $to = strtoupper($to) == 'UTF8' ? 'utf-8' : $to;
        if (strtoupper($from) === strtoupper($to) || empty($fContents) || (is_scalar($fContents) && !is_string($fContents))) {
            //如果编码相同或者非字符串标量则不转换
            return $fContents;
        }
        if (function_exists('mb_convert_encoding')) {
            return mb_convert_encoding($fContents, $to, $from);
        } elseif (function_exists('iconv')) {
            return iconv($from, $to, $fContents);
        } else {
            return $fContents;
        }
    }

    /**
     +----------------------------------------------------------
     * 检查上传的文件类型是否合法
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param string $type 数据
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function checkType($type) {
        if(!empty($this->allowTypes))
            return in_array(strtolower($type),$this->allowTypes);
        return true;
    }

    /**
     +----------------------------------------------------------
     * 检查上传的文件后缀是否合法
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param string $ext 后缀名
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function checkExt($ext) {
        if(!empty($this->allowExts))
            return in_array(strtolower($ext),$this->allowExts,true);
        return true;
    }

    /**
     +----------------------------------------------------------
     * 检查文件大小是否合法
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param integer $size 数据
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function checkSize($size) {
        return !($size > $this->maxSize) || (-1 == $this->maxSize);
    }

    /**
     +----------------------------------------------------------
     * 检查文件是否非法提交
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param string $filename 文件名
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function checkUpload($filename) {
        return is_uploaded_file($filename);
    }

    /**
     +----------------------------------------------------------
     * 取得上传文件的后缀
     +----------------------------------------------------------
     * @access private
     +----------------------------------------------------------
     * @param string $filename 文件名
     +----------------------------------------------------------
     * @return boolean
     +----------------------------------------------------------
     */
    private function getExt($filename) {
        $pathinfo = pathinfo($filename);
        return $pathinfo['extension'];
    }

    /**
     +----------------------------------------------------------
     * 取得上传文件的信息
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return array
     +----------------------------------------------------------
     */
    public function getUploadFileInfo() {
        return $this->uploadFileInfo;
    }

    /**
     +----------------------------------------------------------
     * 取得最后一次错误信息
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function getErrorMsg() {
        return $this->error;
    }

}

2 UploadImage.class.php

<?php
namespace Think;

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Image.class.php 2708 2012-02-06 04:10:11Z liu21st $

/**
  +------------------------------------------------------------------------------
 * 图像操作类库
  +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Util
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: Image.class.php 2708 2012-02-06 04:10:11Z liu21st $
  +------------------------------------------------------------------------------
 */
class UploadImage {

    /**
      +----------------------------------------------------------
     * 取得图像信息
     *
      +----------------------------------------------------------
     * @static
     * @access public
      +----------------------------------------------------------
     * @param string $image 图像文件名
      +----------------------------------------------------------
     * @return mixed
      +----------------------------------------------------------
     */

    static function getImageInfo($img) {
        $imageInfo = getimagesize($img);
        if ($imageInfo !== false) {
            $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1));
            $imageSize = filesize($img);
            $info = array(
                "width" => $imageInfo[0],
                "height" => $imageInfo[1],
                "type" => $imageType,
                "size" => $imageSize,
                "mime" => $imageInfo['mime']
            );
            return $info;
        } else {
            return false;
        }
    }

    /**
      +----------------------------------------------------------
     * 为图片添加水印
      +----------------------------------------------------------
     * @static public
      +----------------------------------------------------------
     * @param string $source 原文件名
     * @param string $water  水印图片
     * @param string $$savename  添加水印后的图片名
     * @param string $alpha  水印的透明度
      +----------------------------------------------------------
     * @return void
      +----------------------------------------------------------
     */
    static public function water($source, $water, $savename=null, $alpha=80) {
        //检查文件是否存在
        if (!file_exists($source) || !file_exists($water))
            return false;

        //图片信息
        $sInfo = self::getImageInfo($source);
        $wInfo = self::getImageInfo($water);

        //如果图片小于水印图片，不生成图片
        if ($sInfo["width"] < $wInfo["width"] || $sInfo['height'] < $wInfo['height'])
            return false;

        //建立图像
        $sCreateFun = "imagecreatefrom" . $sInfo['type'];
        $sImage = $sCreateFun($source);
        $wCreateFun = "imagecreatefrom" . $wInfo['type'];
        $wImage = $wCreateFun($water);

        //设定图像的混色模式
        imagealphablending($wImage, true);

        //图像位置,默认为右下角右对齐
        $posY = $sInfo["height"] - $wInfo["height"];
        $posX = $sInfo["width"] - $wInfo["width"];

        //生成混合图像
        imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo['width'], $wInfo['height'], $alpha);

        //输出图像
        $ImageFun = 'Image' . $sInfo['type'];
        //如果没有给出保存文件名，默认为原图像名
        if (!$savename) {
            $savename = $source;
            @unlink($source);
        }
        //保存图像
        $ImageFun($sImage, $savename);
        imagedestroy($sImage);
    }

    function showImg($imgFile, $text='', $x='10', $y='10', $alpha='50') {
        //获取图像文件信息
        //2007/6/26 增加图片水印输出，$text为图片的完整路径即可
        $info = UploadImage::getImageInfo($imgFile);
        if ($info !== false) {
            $createFun = str_replace('/', 'createfrom', $info['mime']);
            $im = $createFun($imgFile);
            if ($im) {
                $ImageFun = str_replace('/', '', $info['mime']);
                //水印开始
                if (!empty($text)) {
                    $tc = imagecolorallocate($im, 0, 0, 0);
                    if (is_file($text) && file_exists($text)) {//判断$text是否是图片路径
                        // 取得水印信息
                        $textInfo = Image::getImageInfo($text);
                        $createFun2 = str_replace('/', 'createfrom', $textInfo['mime']);
                        $waterMark = $createFun2($text);
                        //$waterMark=imagecolorallocatealpha($text,255,255,0,50);
                        $imgW = $info["width"];
                        $imgH = $info["width"] * $textInfo["height"] / $textInfo["width"];
                        //$y    =   ($info["height"]-$textInfo["height"])/2;
                        //设置水印的显示位置和透明度支持各种图片格式
                        imagecopymerge($im, $waterMark, $x, $y, 0, 0, $textInfo['width'], $textInfo['height'], $alpha);
                    } else {
                        imagestring($im, 80, $x, $y, $text, $tc);
                    }
                    //ImageDestroy($tc);
                }
                //水印结束
                if ($info['type'] == 'png' || $info['type'] == 'gif') {
                    imagealphablending($im, FALSE); //取消默认的混色模式
                    imagesavealpha($im, TRUE); //设定保存完整的 alpha 通道信息
                }
                Header("Content-type: " . $info['mime']);
                $ImageFun($im);
                @ImageDestroy($im);
                return;
            }

            //保存图像
            $ImageFun($sImage, $savename);
            imagedestroy($sImage);
            //获取或者创建图像文件失败则生成空白PNG图片
            $im = imagecreatetruecolor(80, 30);
            $bgc = imagecolorallocate($im, 255, 255, 255);
            $tc = imagecolorallocate($im, 0, 0, 0);
            imagefilledrectangle($im, 0, 0, 150, 30, $bgc);
            imagestring($im, 4, 5, 5, "no pic", $tc);
            UploadImage::output($im);
            return;
        }
    }

    /**
      +----------------------------------------------------------
     * 生成缩略图
      +----------------------------------------------------------
     * @static
     * @access public
      +----------------------------------------------------------
     * @param string $image  原图
     * @param string $type 图像格式
     * @param string $thumbname 缩略图文件名
     * @param string $maxWidth  宽度
     * @param string $maxHeight  高度
     * @param string $position 缩略图保存目录
     * @param boolean $interlace 启用隔行扫描
      +----------------------------------------------------------
     * @return void
      +----------------------------------------------------------
     */
    static function thumb($image, $thumbname, $type='', $maxWidth=200, $maxHeight=50, $interlace=true) {
        // 获取原图信息
        $info = UploadImage::getImageInfo($image);
        if ($info !== false) {
            $srcWidth = $info['width'];
            $srcHeight = $info['height'];
            $type = empty($type) ? $info['type'] : $type;
            $type = strtolower($type);
            $interlace = $interlace ? 1 : 0;
            unset($info);
            $scale = min($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例
            if ($scale >= 1) {
                // 超过原图大小不再缩略
                $width = $srcWidth;
                $height = $srcHeight;
            } else {
                // 缩略图尺寸
                $width = (int) ($srcWidth * $scale);
                $height = (int) ($srcHeight * $scale);
            }

            // 载入原图
            $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
            $srcImg = $createFun($image);

            //创建缩略图
            if ($type != 'gif' && function_exists('imagecreatetruecolor'))
                $thumbImg = imagecreatetruecolor($width, $height);
            else
                $thumbImg = imagecreate($width, $height);

            // 复制图片
            if (function_exists("ImageCopyResampled"))
                imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
            else
                imagecopyresized($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
            if ('gif' == $type || 'png' == $type) {
                //imagealphablending($thumbImg, false);//取消默认的混色模式
                //imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息
                $background_color = imagecolorallocate($thumbImg, 0, 255, 0);  //  指派一个绿色
                imagecolortransparent($thumbImg, $background_color);  //  设置为透明色，若注释掉该行则输出绿色的图
            }

            // 对jpeg图形设置隔行扫描
            if ('jpg' == $type || 'jpeg' == $type)
                imageinterlace($thumbImg, $interlace);

            // 生成图片
            $imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
            $imageFun($thumbImg, $thumbname);
            imagedestroy($thumbImg);
            imagedestroy($srcImg);
            return $thumbname;
        }
        return false;
    }

    /**
      +----------------------------------------------------------
     * 把图像转换成字符显示
      +----------------------------------------------------------
     * @static
     * @access public
      +----------------------------------------------------------
     * @param string $image  要显示的图像
     * @param string $type  图像类型，默认自动获取
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     */
    static function showASCIIImg($image, $string='', $type='') {
        $info = Image::getImageInfo($image);
        if ($info !== false) {
            $type = empty($type) ? $info['type'] : $type;
            unset($info);
            // 载入原图
            $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
            $im = $createFun($image);
            $dx = imagesx($im);
            $dy = imagesy($im);
            $i = 0;
            $out = '<span style="padding:0px;margin:0;line-height:100%;font-size:1px;">';
            set_time_limit(0);
            for ($y = 0; $y < $dy; $y++) {
                for ($x = 0; $x < $dx; $x++) {
                    $col = imagecolorat($im, $x, $y);
                    $rgb = imagecolorsforindex($im, $col);
                    $str = empty($string) ? '*' : $string[$i++];
                    $out .= sprintf('<span style="margin:0px;color:#%02x%02x%02x">' . $str . '</span>', $rgb['red'], $rgb['green'], $rgb['blue']);
                }
                $out .= "<br>\n";
            }
            $out .= '</span>';
            imagedestroy($im);
            return $out;
        }
        return false;
    }

    /**
      +----------------------------------------------------------
     * 生成UPC-A条形码
      +----------------------------------------------------------
     * @static
      +----------------------------------------------------------
     * @param string $type 图像格式
     * @param string $type 图像格式
     * @param string $lw  单元宽度
     * @param string $hi   条码高度
      +----------------------------------------------------------
     * @return string
      +----------------------------------------------------------
     */
    static function UPCA($code, $type='png', $lw=2, $hi=100) {
        static $Lencode = array('0001101', '0011001', '0010011', '0111101', '0100011',
    '0110001', '0101111', '0111011', '0110111', '0001011');
        static $Rencode = array('1110010', '1100110', '1101100', '1000010', '1011100',
    '1001110', '1010000', '1000100', '1001000', '1110100');
        $ends = '101';
        $center = '01010';
        /* UPC-A Must be 11 digits, we compute the checksum. */
        if (strlen($code) != 11) {
            die("UPC-A Must be 11 digits.");
        }
        /* Compute the EAN-13 Checksum digit */
        $ncode = '0' . $code;
        $even = 0;
        $odd = 0;
        for ($x = 0; $x < 12; $x++) {
            if ($x % 2) {
                $odd += $ncode[$x];
            } else {
                $even += $ncode[$x];
            }
        }
        $code.= ( 10 - (($odd * 3 + $even) % 10)) % 10;
        /* Create the bar encoding using a binary string */
        $bars = $ends;
        $bars.=$Lencode[$code[0]];
        for ($x = 1; $x < 6; $x++) {
            $bars.=$Lencode[$code[$x]];
        }
        $bars.=$center;
        for ($x = 6; $x < 12; $x++) {
            $bars.=$Rencode[$code[$x]];
        }
        $bars.=$ends;
        /* Generate the Barcode Image */
        if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
            $im = imagecreatetruecolor($lw * 95 + 30, $hi + 30);
        } else {
            $im = imagecreate($lw * 95 + 30, $hi + 30);
        }
        $fg = ImageColorAllocate($im, 0, 0, 0);
        $bg = ImageColorAllocate($im, 255, 255, 255);
        ImageFilledRectangle($im, 0, 0, $lw * 95 + 30, $hi + 30, $bg);
        $shift = 10;
        for ($x = 0; $x < strlen($bars); $x++) {
            if (($x < 10) || ($x >= 45 && $x < 50) || ($x >= 85)) {
                $sh = 10;
            } else {
                $sh = 0;
            }
            if ($bars[$x] == '1') {
                $color = $fg;
            } else {
                $color = $bg;
            }
            ImageFilledRectangle($im, ($x * $lw) + 15, 5, ($x + 1) * $lw + 14, $hi + 5 + $sh, $color);
        }
        /* Add the Human Readable Label */
        ImageString($im, 4, 5, $hi - 5, $code[0], $fg);
        for ($x = 0; $x < 5; $x++) {
            ImageString($im, 5, $lw * (13 + $x * 6) + 15, $hi + 5, $code[$x + 1], $fg);
            ImageString($im, 5, $lw * (53 + $x * 6) + 15, $hi + 5, $code[$x + 6], $fg);
        }
        ImageString($im, 4, $lw * 95 + 17, $hi - 5, $code[11], $fg);
        /* Output the Header and Content. */
        Image::output($im, $type);
    }

    static function output($im, $type='png', $filename='') {
        header("Content-type: image/" . $type);
        $ImageFun = 'image' . $type;
        if (empty($filename)) {
            $ImageFun($im);
        } else {
            $ImageFun($im, $filename);
        }
        imagedestroy($im);
    }

}

第二步  视图中增加简单代码

我的测试代码放在这里  /Application/Home/View/Index/index.html

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>多图片上传预览(原创)-jq22.com</title>
<script src="http://libs.baidu.com/jquery/1.11.3/jquery.min.js"></script>
<style>
img {
          vertical-align: top;
          width:500px;
       }</style>
</head>
<body>
<form enctype="multipart/form-data" action="__URL__/upload" method="post">

<input id="browse" name="photo[]" type="file" onchange="previewFiles()" multiple="">
<div id="preview"></div>
 <input type="submit" value="提交">
</form>
</body>
</html>

<script>
function previewFiles() {

    var preview = document.querySelector('#preview');
    var files = document.querySelector('input[type=file]').files;

    function readAndPreview(file) {

        // Make sure `file.name` matches our extensions criteria
        if (/\.(jpe?g|png|gif)$/i.test(file.name)) {
            var reader = new FileReader();

            reader.addEventListener("load", function() {
                var image = new Image();
                image.title = file.name;
                image.src = this.result;
                preview.appendChild(image);
            }, false);

            reader.readAsDataURL(file);
        }

    }

    if (files) {
        [].forEach.call(files, readAndPreview);
    }

}
</script>

</body>
</html>

第3 控制器的上传代码

/Application/Home/Controller/IndexController.class.php

<?php
namespace Home\Controller;
use Think\Controller;

class IndexController extends Controller {
    public function upload()
    {
        $upload = new \Think\UploadFile();// 实例化上传类
        $upload->maxSize = 3000000 ;// 设置附件上传大小  C('UPLOAD_SIZE');
        $upload->savePath = './Uploads/' . 'thumb/'; // 设置附件上传目录
        $upload->allowExts = array('jpg', 'gif', 'png', 'jpeg'); // 设置附件上传类型
        $upload->saveRule = 'uniqid';
        $upload->uploadReplace = true; //是否存在同名文件是否覆盖

        $upload->thumb = true; //是否对上传文件进行缩略图处理
        $upload->thumbMaxWidth = '300,600'; //缩略图处理宽度
        $upload->thumbMaxHeight = '200,400'; //缩略图处理高度
        $upload->thumbPrefix = 'm_,s_';  //生产2张缩略图
        $upload->thumbPath = './Uploads/' . 'thumb/' . date('Ymd', time()) . '/'; //缩略图保存路径

        $upload->thumbRemoveOrigin = true; //上传图片后删除原图片
        $upload->autoSub = true; //是否使用子目录保存图片
        $upload->subType = 'date'; //子目录保存规则
        $upload->dateFormat = 'Ymd'; //子目录保存规则为date时时间格式

        if(!$upload->upload()){// 上传错误提示错误信息
            $this->error($upload->getError());
        } else {
            $info = $upload->getUploadFileInfo();

            foreach($info as $file)
            {
                /*$model = M( 'web_img');
                $picname = $file['savename'];
                $picname = explode('/', $picname);
                $url1 = $picname[0] . '/' . 'm_' . $picname[1];
                $url2 = $picname[0] . '/' . 's_' . $picname[1];
                $temp["face"] = $file['savepath'].$url2;    //大缩略图
                $temp["thumb"] = $file['savepath'].$url1;   //小缩略图
                $temp["Addtime"] = date("Y/m/d H:i:s");
                //$save=$model->add($temp);
                 * */
                $save=1;
            }
            if($save){
                $this->success('上传成功！');
            }
        }

    }
}

最后看下效果