php实现常用文件上传类的示例

废话不多说，直接上代码：

<?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}

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