Description:
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php download file name '≈你 好;123.zip'; file name is &ap

c# can download 

Test script:
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php download file name '≈你 好;123.zip';
$filename = iconv('utf-8',"gbk//IGNORE",$filename);

$filepath = 'D:/www/'.$filename;


$file=fopen($filepath,"r");

header("Content-type:text/html;charset=utf-8");

header("Content-Type: application/octet-stream");

header("Accept-Ranges: bytes");

header("Accept-Length: ".filesize($filepath));

header("Content-Disposition: attachment; filename= $filename ; filename*=utf-8''$filename ");

echo fread($file,filesize($filepath));

fclose($file);

Expected result:
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php download file name '≈你 好;123.zip';

Actual result:
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php download file name '≈你 好;123.zip';