PHP上传文件封装

<?phpclass UpFile{public $FilePath = "./images";public $FileType = array("image/jpeg","image/bmp","image/gif");public $FileSize = 1000000;function __construct($InputName){$this->File = $InputName;}function UpLoadFile(){$this->UpType = $this->File["type"];//获取上传文件类型$this->UpName = $this->File["name"];$this->UpTmp_Name = $this->File["tmp_name"];$this->UpSize = $this->File["size"];if($this->UpSize > $this->FileSize){echo "<mce:script type="text/javascript"><!--";echo "alert('上传文件太大!');";echo "location.href='javascript:history.go(-1)';";echo "// --></mce:script>";}if(!in_array($this->UpType,$this->FileType)){echo "<mce:script type="text/javascript"><!--";echo "alert('上传类型不正确 只能上传gif|jpg|png文件');";echo "location.href='javascript:history.go(-1)';";echo "// --></mce:script>";}if(!file_exists($this->FilePath)){mkdir($this->FilePath);}if($this->File["error"]==0){$this->FileNameType = pathinfo($this->UpName);$this->FileNameType = $this->FileNameType["extension"];$this->FileName = $this->FilePath . "/" ."S_". date("Ymdhis") . "." .$this->FileNameType;if(move_uploaded_file($this->UpTmp_Name,$this->FileName)){echo "<mce:script type="text/javascript"><!--";echo "alert('文件上传成功!');";echo "location.href='javascript:history.go(-1)';";echo "// --></mce:script>";}else{echo "<mce:script type="text/javascript"><!--";echo "alert('文件上传失败');";echo "location.href='javascript:history.go(-1)';";echo "// --></mce:script>";}}else{echo "<mce:script type="text/javascript"><!--";echo "alert('上传文件失败!');";echo "location.href='javascript:history.go(-1)';";echo "// --></mce:script>";}return $this->FileName; }}?>//调用 include_once("UpLoadFile.php");if($_POST["submit"]){$InputName = $_FILES["UpFile"];$UpFile = new UpFile($InputName);$name = $UpFile->UpLoadFile();$MyImage = new ImageReSize($name,"100","80","./images/");$MyImage->GoReSize();}?><form enctype="multipart/form-data" action="" method="POST"><input type="file" name="UpFile"/><input type="submit" value="上传文件" name="submit"/></form>