下载代码在wordpress中不起作用[重复]

Question

This question already has an answer here:

• Forcing to download a file using PHP 10 answers

When I am downloading an image it's displaying these characters on screen.

�M\cIDATx��\i��v�U�ݳ��x���6`8�Y�&@��#D �����HDʟ'�~�z;a���D,�c������ƌ���ٺ�*�w�=շjz^z�ـ���UwWWݺ�;�|g��&H���o�Gy�

Answer 1

I have tried with your code and found no problem. After read your comment and try with your file thetexturemill.com/wp-content/uploads/2013/07/dell.png I have this code working:

# my demo value in my local machine
$path = dirname(__FILE__) . "/demo";
$file_name = "Capture.PNG";    
#$fn = realpath($path.'/'.$file_name);
$fn = "http://thetexturemill.com/wp-content/uploads/2013/07/dell.png";
//var_dump(readfile($fn));

$mm_type="application/octet-stream";
#$mm_type=mime_content_type($fn);
#echo $mm_type; die();
ob_get_flush();
header("Cache-Control: public, must-revalidate");
header("Pragma: hack");
header("Content-Type: " . $mm_type);
#header("Content-Length: " .(string)(filesize($fn)) );
header('Content-Disposition: attachment; filename="'.$file_name.'"');
header("Content-Transfer-Encoding: binary
");
readfile($fn);
flush();
die();

What problems I found are:

• If you use an image from remote host, make sure you can get it (the allow_url_fopen INI option is ON and the returned value from readfile is greater than zero) and do not use filesize as well as mime_content_type functions.
• I don't know whether thetexturemill.com is your domain name or folder name. Supposed that it is a domain name, remember to add the protocal prefix (http:// as in example)
• Do not output anything before the header function calls or your downloaded file will not be open properly.

Ah, for local file, your original code work without errors on my machine.