PHP文件下载函数(代码)

<p>function download($file_url,$new_name=''){</p> if(!isset($file_url)||trim($file_url)==''){<br /> return '500';<br /> }<br /> if(!file_exists($file_url)){ //检查文件是否存在<br /> return '404';<br /> }<br /> $file_name=basename($file_url);<br /> $file_type=explode('.',$file_url);<br /> $file_type=$file_type[count($file_type)-1];<br /> $file_name=trim($new_name=='')?$file_name:urlencode($new_name).'.'.$file_type;<br /> $file_type=fopen($file_url,'r'); //打开文件<br /> //输入文件标签<br /> header("Content-type: application/octet-stream");<br /> header("Accept-Ranges: bytes");<br /> header("Accept-Length: ".filesize($file_url));<br /> header("Content-Disposition: attachment; filename=".$file_name);<br /> //输出文件内容<br /> echo fread($file_type,filesize($file_url));<br /> fclose($file_type);<br /><p>}</p>
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