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<?php function download($file_dir,$file_name) //参数说明: //file_dir:文件所在目录 //file_name:文件名 { $file_dir = chop($file_dir);//去掉路径中多余的空格 //得出要下载的文件的路径 if($file_dir != '') { $file_path = $file_dir; if(substr($file_dir,strlen($file_dir)-1,strlen($file_dir)) != '/') $file_path .= '/'; $file_path .= $file_name; } else { $file_path = $file_name; } //判断要下载的文件是否存在 if(!file_exists($file_path)) { echo '对不起,你要下载的文件不存在。'; return false; } $file_size = filesize($file_path); header("Content-type: application/octet- tream"); header("Accept-Range : byte "); header("Accept-Length: $file_size"); header("Content-Disposition: attachment; filename=".$file_name); $fp= fopen($file_path,"r"); $buffer_size = 1024; $cur_pos = 0; while(!feof($fp)&&$file_size-$cur_pos>$buffer_size) { $buffer = fread($fp,$buffer_size); echo $buffer; $cur_pos += $buffer_size; } $buffer = fread($fp,$file_size-$cur_pos); echo $buffer; fclose($fp); return true; } download("c:\AppServ\www\test.txt","txt"); ?> |
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