使用IE7时，无法下载CSV文件

[devotedsky]

IE6，IE8，IE9和firefox均能下载。
IE7有时能下，有时不能。
下载失败时，页面会显示$_POST的内容。但程序对$_POST没有做任何print处理。

CSV下载代码如下：

		header("Pragma: public");
		header("Expires: 0");
		header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
		header("Cache-Control: public");
		header("Content-Description: File Transfer");

		//Use the switch-generated Content-Type
		header("Content-Type: application/x-csv");

		//Force the download
		$F_header="Content-Disposition: inline; filename=".$P_DLFName.";";
		header($F_header );
		header("Content-Transfer-Encoding: binary");
		header("Content-Length: ".$F_len);

		for ( $i=0; $i<$F_num; $i++ ){
			$F_path = $PA_FName[$i];
			if ($F_file = fopen($F_path, 'rb')) {
				while(!feof($F_file) and (connection_status()==0)) {
					print(fread($F_file, 1024*8));
					flush();
				}
				fclose($F_file);
			}
		}

求解。

[tottyandbaty]

    $archivo="ChannelDataDetail.csv";
 
    header('Content-Type: application/download');
    header("Content-Disposition: attachment; filename='{$today}.csv'");
    header("Content-Length: " . filesize($archivo));

    $fp = fopen($archivo, "r");
    fpassthru($fp);
    fclose($fp);

[z109876543210]

<?php
require_once ("_global.inc.php");

$dlfile = get_dlfile_url($_SERVER['QUERY_STRING'], 'http://www.ydtuiguang.com/', 'download/');//检查文件路径限制下载其它目录文件
if(!exists_file($dlfile)){
    message_box('1040');
}
$filename = get_file_name($dlfile);
$fileext = get_file_ext($dlfile);
if(in_array(strtolower($fileext), array("", "js", "php", "inc", "xml", "html", "htm"))){//检测文件类型防止下载代码文件
    message_box('1040');
}
//调用下载
_private_download($dlfile, $filename.'.'.$fileext);


//以下是下PHP下载大文件函数
function _private_download($url, $filename){
    // 获得文件大小, 防止超过2G的文件, 用sprintf来读
    $filesize = sprintf("%u", filesize($url)); 
    if (!$filesize) 
    { 
        return; 
    }        
    header("Content-type:application/octet-stream\n"); //application/octet-stream 
    header("Content-type:unknown/unknown;"); 
    header("Content-disposition: attachment; filename=\"".$filename."\""); 
    header('Content-transfer-encoding: binary');         
    if ($range = getenv('HTTP_RANGE')) // 当有偏移量的时候，采用206的断点续传头 
    { 
        $range = explode('=', $range); 
        $range = $range[1]; 
    
        header("HTTP/1.1 206 Partial Content"); 
        header("Date: " . gmdate("D, d M Y H:i:s") . " GMT"); 
        header("Last-Modified: ".gmdate("D, d M Y H:i:s", filemtime($url))." GMT"); 
        header("Accept-Ranges: bytes"); 
        header("Content-Length:".($filesize - $range)); 
        header("Content-Range: bytes ".$range.($filesize-1)."/".$filesize); 
        header("Connection: close"."\n\n"); 
    } 
    else 
    { 
        header("Content-Length:".$filesize."\n\n"); 
        $range = 0; 
    }
   _private_loadFile($url);               
}

function _private_loadFile($filename, $retbytes = true) {
    $buffer = '';
    $cnt =0;        
    $handle = fopen($filename, 'rb');
    if ($handle === false) {
        return false;
    }
    while (!feof($handle)) {
        $buffer = fread($handle, 1024*1024);
        echo $buffer;
        ob_flush();
        flush();
        if ($retbytes) {
        $cnt += strlen($buffer);
        }
    }
    $status = fclose($handle);
    if ($retbytes && $status) {
        return $cnt; // return num. bytes delivered like readfile() does.
    }
    return $status;
} 
?>