<?php

/**

 * 上传文件类

 * @param _path : 服务器文件存放路径

 * @param _allowType : 允许上传的文件类型和所对应的MIME

 * @param _file : 上传的文件信息

 */

class Upload{

    private $_path;

    private $_allowType;

    private $_file;

    /**

     * 构造函数

     * @param string : 服务器上存放上传文件的路径

     */

    function __construct( $path = '' )

    {

        $this->_path = $path;

        $this->_allowType = array(

                // images

                'bmp' => 'image/x-ms-bmp',

                'jpg' => 'image/jpeg',

                'jpeg' => 'image/jpeg',

                'gif' => 'image/gif',

                'png' => 'image/png',

                'tif' => 'image/tiff',

                'tiff' => 'image/tiff',

                'tga' => 'image/x-targa',

                'psd' => 'image/vnd.adobe.photoshop',

                //文本

                'txt' => 'text/plain',

                'php' => 'text/x-php',

                'html' => 'text/html',

                'htm' => 'text/html',

                'js' => 'text/javascript',

                'css' => 'text/css',

                'rtf' => 'text/rtf',

                'rtfd' => 'text/rtfd',

                'py' => 'text/x-python',

                'java' => 'text/x-java-source',

                'rb' => 'text/x-ruby',

                'sh' => 'text/x-shellscript',

                'pl' => 'text/x-perl',

                'sql' => 'text/x-sql',

                //应用

                'exe' => 'application/octet-stream',

                'doc' => 'application/vnd.ms-word',

                'docx' => 'application/vnd.ms-word',

                'xls' => 'application/vnd.ms-excel',

                'ppt' => 'application/vnd.ms-powerpoint',

                'pps' => 'application/vnd.ms-powerpoint',

                'pdf' => 'application/pdf',

                'xml' => 'application/xml',

                //音频

                'mp3' => 'audio/mpeg',

                'mid' => 'audio/midi',

                'ogg' => 'audio/ogg',

                'mp4a' => 'audio/mp4',

                'wav' => 'audio/wav',

                'wma' => 'audio/x-ms-wma',

                //视频

                'avi' => 'video/x-msvideo',

                'dv' => 'video/x-dv',

                'mp4' => 'video/mp4',

                'mpeg' => 'video/mpeg',

                'mpg' => 'video/mpeg',

                'mov' => 'video/quicktime',

                'wm' => 'video/x-ms-wmv',

                'flv' => 'video/x-flv',

                'mkv' => 'video/x-matroska'

            );

    }

    /**

     * 上传函数

     * @param  string : 表单元素的name 值

     * @return [type]

     */

    public function upload( $txtName = '' )

    {

        $this->_file = $_FILES[$txtName];

        if( $this->_file['error'] == 0){

            $fileType = end( explode('.', $this->_file['name'] ));

            $allowType = array();

            foreach( $this->_allowType as $item=>$value ){

                $allowType[] = $item;

            }

            if( !in_array($fileType, $allowType)){

                die('上传的文件格式不正确！');

            }else{

                if(move_uploaded_file($this->file['tmp_name'], ($this->path).$this->file['name']))

                    {

                        echo "<script>alert('上传成功!')</script>";

                    }

                else

                    {

                        echo "<script>alert('上传失败!');</script>";

                    }

            }

        }else{

            //没有正确上传

            switch ($this->file['error']){

                case 1:

                    die('文件大小超过系统限制。');

                    break;

                case 2:

                    die('文件大小超过预定义限制。');

                    break;

                case 3:

                    die('文件为完全上传。');

                    break;

                case 4:

                    die('未上传任何文件。');

                    break;

                default:

                    die('上传出错');

                    break;

            }

        }

    }

    //end upload

}