php click link image download program code

	页面用<a href>click</a>跳转进来，就可以直接下载文件了

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	$imageName = $_GET['imageName'];
	$imageUrl = $_GET['imageUrl'];
	
	$localhostPath = str_replace("\\","/",dirname(__FILE__));  //这里要引用绝对路径
	$imageUrl = $localhostPath."/".$imageUrl."/".$imageName;   //合并成一个完整的路径
	$imageUrl = iconv('utf-8', 'gbk', $imageUrl);              //这里可以防止中文名文件乱码,我的机器环境是utf-8
	
	header('Content-type: application/octet-stream');
	header('Content-Disposition: attachment; filename='.$filename); 
	header("Content-Length:". filesize($imageName));  
	
	ob_clean();
	flush();
	readfile($imageUrl);