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<?php
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/**
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*
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* Editor.md PHP简易上传类（仅供演示用，生产环境使用还需谨慎考虑）
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*
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* @FileName: editormd.uploader.class.php
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* @Auther: Pandao
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* @E-mail: pandao@vip.qq.com
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* @CreateTime: 2015-02-13 23:31:32
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* @UpdateTime: 2015-06-02 15:36:23
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* Copyright@2015 Editor.md all right reserved.
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*/
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class EditorMdUploader
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{
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public $files; // $_FILES数组
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public $fileExit; // 文件扩展名
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public $saveName; // 最终保存的文件名
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public $saveURL; // 最终保存URL地址
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public $savePath; // 保存本地文件路径
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public $randomLength = ''; // 生成随机文件名的长度，当为日期时为日期的格式
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public $randomNameType = 1; // 生成随机的形式, NULL为保留原文件名, 1生成随机字符串, 2生成日期文件名
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public $formats = array( // 允许上传的文件格式
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'gif', 'jpg', 'jpeg', 'png', 'bmp'
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);
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public $maxSize = 1024; // 最大上传文件大小，单位KB
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public $cover = true; // 是否覆盖同名文件, 1覆盖,0不覆盖
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public $redirect = false; // 是否进行URL跳转
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public $redirectURL = ""; // 上传成功或出错后要转到的URL
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public $errors = array( // 错误信息
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'empty' => '上传文件不能为空',
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'format' =>'上传的文件格式不符合规定',
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'maxsize' => '上传的文件太大',
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'unwritable' => '保存目录不可写，请更改权限',
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'not_exist' => '保存目录不存在',
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'same_file' => '已经有相同的文件存在'
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);
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/**
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* 构造函数，初始化对象
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*
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* @access public
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* @param string $savePath 最终保存的本地路径
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* @param string $saveURL 最终保存的URL地址
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* @param string $formats 允许上传的文件格式
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* @param Number $randomNameType 是否生成随机文件名及形式
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* @param Intiger/string $randomLength 生成随机文件名字符的长度
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* @param boolean $cover 是否覆盖相同文件
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* @param Intiger $maxSize 允许最大的上传文件大小，以KB为单位
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* @return viod
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*/
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public function __construct($savePath, $saveURL, $formats, $randomNameType = 1, $randomLength = '', $cover = true, $maxSize = 1024)
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{
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$this->savePath = $savePath;
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$this->saveURL = $saveURL;
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$this->formats = $formats;
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$this->maxSize = $maxSize;
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$this->cover = $cover;
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$this->randomNameType = $randomNameType;
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$this->randomLength = $randomLength;
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}
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/**
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* 配置参数函数
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*
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* @access public
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* @param array $configs 配置项数组
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* @return void
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*/
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public function config($configs)
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{
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foreach($configs as $key => $value)
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{
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$this->$key = $value;
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}
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}
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/**
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* 执行文件上传
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*
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* @access public
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* @param string $name fileInput's name
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* @return boolean 返回是否上传成功的布尔值
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*/
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public function upload($name)
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{
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if(empty($_FILES[$name]['name'])) //上传文件为空时
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{
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$this->message($this->errors['empty']);
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return false;
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}
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$this->files = $_FILES[$name];
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if(!file_exists($this->savePath)) //目录不存在
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{
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$this->message($this->errors['not_exist']);
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return false;
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}
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if(!is_writable($this->savePath)) //目录不可写
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{
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$this->message($this->errors['unwritable']);
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return false;
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}
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$this->fileExt = $this->getFileExt($this->files["name"]); //取得扩展名
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$this->setSeveName();
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return $this->moveFile();
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}
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/**
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* 检查并移动上传文件
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*
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* @access private
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* @return boolean
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*/
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private function moveFile()
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{
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$files = $this->files;
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if ($this->formats != "" && !in_array($this->fileExt, $this->formats))
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{
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$formats = implode(',', $this->formats);
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$message = "您上传的文件" . $files["name"] . "是" . $this->fileExt . "格式的，系统不允许上传，您只能上传" . $formats . "格式的文件。";
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$this->message($message);
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return false;
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}
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if ($files["size"] / 1024 > $this->maxSize)
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{
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$message = "您上传的 " . $files["name"] . "，文件大小超出了系统限定值" . $this->maxSize . " KB，不能上传。";
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$this->message($message);
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return false;
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}
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if (!$this->cover) //当不能覆盖时
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{
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if(file_exists($this->savePath.$this->saveName)) //有相同的文件存在
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{
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$this->message($this->saveName . $this->errors['same_file']);
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return false;
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}
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}
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if (!@move_uploaded_file($files["tmp_name"], iconv("utf-8", "gbk", $this->savePath . $this->saveName)))
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{
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switch($files["errors"])
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{
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case '0':
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$message = "文件上传成功";
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break;
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case '1':
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$message = "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值";
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break;
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case '2':
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$message = "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值";
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break;
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case '3':
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$message = "文件只有部分被上传";
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break;
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case '4':
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$message = "没有文件被上传";
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break;
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case '6':
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$message = "找不到临时目录";
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break;
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case '7':
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$message = "写文件到硬盘时出错";
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break;
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case '8':
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$message = "某个扩展停止了文件的上传";
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break;
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case '999':
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default:
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$message = "未知错误，请检查文件是否损坏、是否超大等原因。";
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break;
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}
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$this->message($message);
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return false;
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}
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@unlink($files["tmp_name"]); //删除临时文件
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return true;
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}
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/**
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* 生成随机文件名函数
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*
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* @access private
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* @return string $fileName 返回生成的文件名字符串
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*/
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private function randomFileName()
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{
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if ($this->randomNameType == 1) // 生成时间格式文件名
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{
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date_default_timezone_set('PRC'); //设置时区
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$date = date($this->randomLength);
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$fileName = $date . "_" . mt_rand(10000, 99999);
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}
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elseif ($this->randomNameType == 2) // 生成随机字符文件名
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{
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$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
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$max = strlen($chars) - 1;
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mt_srand((double)microtime() * 1000000);
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for($i = 0; $i < $this->randomLength; $i++)
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{
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$fileName .= $chars[mt_rand(0, $max)];
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}
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}
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else
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{
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$fileName = '';
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}
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return $fileName;
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}
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/**
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* 组成最终保存的完整路径及文件名
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*
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* @access private
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* @return void
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*/
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private function setSeveName()
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{
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$this->saveName = $this->randomFileName();
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if($this->saveName == '') //如果没生成随机文件名，就保留原文件名
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{
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$this->saveName = $this->files['name'];
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}
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}
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/**
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* 取得保存的文件名，用于数据库存储
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*
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* @access public
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* @return string
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*/
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public function getSeveName()
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{
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return $this->saveName;
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}
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/**
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* 获取文件后缀名函数
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*
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* @access public
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* @return string
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*/
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public function getFileExt($fileName)
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{
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return trim(strtolower(substr(strrchr($fileName, '.'), 1)));
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}
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/**
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* 上传成功或出错后跳转
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*
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* @access public
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* @param array $configs 配置项数组
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* @return void
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*/
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public function redirect()
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{
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header('location: ' . $this->redirectURL);
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}
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/**
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* 错误提示函数
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*
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* @access public
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* @return void
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*/
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public function message($message, $success = 0)
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{
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$array = array(
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'success' => $success
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);
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$url = $this->saveURL . $this->saveName;
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// 适用于跨域上传时，跳转到中介页面等
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if ($this->redirect)
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{
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$this->redirectURL .= "&success=" . $success . "&message=" . $message;
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if ($success == 1)
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{
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$this->redirectURL .= '&url=' . $url;
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}
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$this->redirect();
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}
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else
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{
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if ($success == 1)
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{
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$array['url'] = $url;
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}
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else
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{
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$array['message'] = $message;
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}
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echo json_encode($array);
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}
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}
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}
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