PHP文件强制下载TXT文件，下载后格式丢失
我有一个格式化的TXT文件，当它被强制下载使用PHP脚本，它正在失去格式，请让我知道，如果有任何其他的方式这样做 Pl在下面找到download.php脚本文件：PHP文件强制下载TXT文件，下载后格式丢失,php,text,download,Php,Text,Download,我有一个格式化的TXT文件，当它被强制下载使用PHP脚本，它正在失去格式，请让我知道，如果有任何其他的方式这样做 Pl在下面找到download.php脚本文件： <?php function output_file($file, $name, $mime_type='') { /* This function takes a path to a file to output ($file), the filename that the browser will see (
<?php
function output_file($file, $name, $mime_type='')
{
/*
This function takes a path to a file to output ($file), the filename that the browser will see ($name) and the MIME type of the file ($mime_type, optional).
*/
//Check the file premission
if(!is_readable($file)) die('File not found or inaccessible!');
$size = filesize($file);
$name = rawurldecode($name);
/* Figure out the MIME type | Check in array */
$known_mime_types=array(
"pdf" => "application/pdf",
"txt" => "text/plain",
"html" => "text/html",
"htm" => "text/html",
"exe" => "application/octet-stream",
"zip" => "application/zip",
"doc" => "application/msword",
"xls" => "application/vnd.ms-excel",
"ppt" => "application/vnd.ms-powerpoint",
"gif" => "image/gif",
"png" => "image/png",
"jpeg"=> "image/jpg",
"jpg" => "image/jpg",
"php" => "text/plain"
);
if($mime_type==''){
$file_extension = strtolower(substr(strrchr($file,"."),1));
if(array_key_exists($file_extension, $known_mime_types)){
$mime_type=$known_mime_types[$file_extension];
} else {
$mime_type="application/force-download";
};
};
//turn off output buffering to decrease cpu usage
@ob_end_clean();
// required for IE, otherwise Content-Disposition may be ignored
if(ini_get('zlib.output_compression'))
ini_set('zlib.output_compression', 'Off');
header('Content-Type: ' . $mime_type);
header('Content-Disposition: attachment; filename="'.$name.'"');
header("Content-Transfer-Encoding: binary");
header('Accept-Ranges: bytes');
/* The three lines below basically make the
download non-cacheable */
header("Cache-control: private");
header('Pragma: private');
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
// multipart-download and download resuming support
if(isset($_SERVER['HTTP_RANGE']))
{
list($a, $range) = explode("=",$_SERVER['HTTP_RANGE'],2);
list($range) = explode(",",$range,2);
list($range, $range_end) = explode("-", $range);
$range=intval($range);
if(!$range_end) {
$range_end=$size-1;
} else {
$range_end=intval($range_end);
}
$new_length = $range_end-$range+1;
header("HTTP/1.1 206 Partial Content");
header("Content-Length: $new_length");
header("Content-Range: bytes $range-$range_end/$size");
} else {
$new_length=$size;
header("Content-Length: ".$size);
}
/* Will output the file itself */
$chunksize = 1*(1024*1024); //you may want to change this
$bytes_send = 0;
if ($file = fopen($file, 'r'))
{
if(isset($_SERVER['HTTP_RANGE']))
fseek($file, $range);
while(!feof($file) &&
(!connection_aborted()) &&
($bytes_send<$new_length)
)
{
$buffer = fread($file, $chunksize);
print($buffer); //echo($buffer); // can also possible
flush();
$bytes_send += strlen($buffer);
}
fclose($file);
} else
//If no permissiion
die('Error - can not open file.');
//die
die();
}
//Set the time out
set_time_limit(0);
//path to the file
$file_path=$_REQUEST['filename'];
//Call the download function with file path,file name and file type
output_file($file_path, ''.$_REQUEST['filename'].'', 'text/plain');
?>
<html>
<head>
<title></title>
</head>
<body>
<CENTER> <a href='download.php?filename=testFile.txt'>Download print file </a> </center><br>
</body>
</html>
但是，由于application/force download未在Internet Assigned Numbers Authority注册，因此并非所有Web浏览器都能识别它，这会导致计算机用户端出现错误。Mime application/force download，通常表示为Mime application/x-force-download，通常与PHP代码结合使用以触发下载框，而不是在Web浏览器中显示内容 例如，如果您的网站上有一个文件希望用户下载而不是在Web浏览器中查看，则可以在文件的标题内容类型字段中输入相应的mime应用程序/强制下载代码。请注意，mime应用程序/强制下载不是注册的mime类型。此外，在PHP代码中使用时，mime application/force download的首选拼写包含“x-”前缀 还有其他强制下载的方法，包括使用content disposition参数将文件标识为附件。许多PHP脚本在if/else语句中包含mime application/force download，以强制下载通常显示在Web浏览器中的特定文件类型，如PDF文件和图像文件
但是，由于应用程序/强制下载未在Internet Assigned Numbers Authority注册，因此并非所有Web浏览器都能识别它，这会导致计算机用户端出现错误。什么是“格式丢失”呢？我有一个文本文件，其中使用str_pad（）添加了空格，在打印的发票纸上打印。如果我使用ftp下载txt文件，它就是这样。当我使用此脚本下载时，它会释放空格。@user1387008浏览器不会解释
\n$known\u mime\u类型“txt”=>“text/plain”，“txt”=>“application/force download”，\n$known\u mime\u类型“txt”=>“text/plain”，“txt”=>“application/force download”，