$boundary   = md5(time());
$postStr  = "";
$postStr .="--".$boundary."\r\n";
$postStr .="Content-Disposition: form-data; name=\"uptxt[]\"; filename=\"index_1.html\"\r\n";
$postStr .="Content-Type: text/html\r\n\r\n";
$postStr .=$uploadFile."\r\n"; #这里是部分文件内容
$postStr .="--".$boundary."\r\n";

$boundary   = md5(time());
$postStr  = ""; 
$postStr .="--".$boundary."\r\n";
$postStr .="Content-Disposition: form-data; name=\"uptxt[]\"; filename=\"index_1.html\"";
$postStr .="Content-Type: text~html";                                                                                                       
$postStr .="123\r\n"; #这里是部分文件内容
$postStr .="--".$boundary."\r\n";

------解决方案--------------------
不是用curl吗？网上找了一段是这样的：
Perl code

<?php
$url  = 'http://www.myheritage.cn/FP/Company/tryFaceRecognition.php';//target url
 
$fields['file'] = '@'.'C:\Users\lzyy\Desktop\3431821560_5e18c02221.jpg';
$fields['lang'] = 'ZH';
$fields['morph'] = '1';
$fields['popup'] = 'PJSLVMMT';
$fields['loadMethod'] = 'myFiles';
 
$ch = curl_init();
 
curl_setopt($ch, CURLOPT_URL, $url );
curl_setopt($ch, CURLOPT_POST, 1 );
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields );
//curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_REFERER, "http://www.myheritage.cn/");
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);//get redirect content
 
curl_exec( $ch );
//$rs = curl_exec($ch);
 
if ($error = curl_error($ch) ) {
          die($error);
}
curl_close($ch);
//print_r(htmlspecialchars($rs));
echo 'ok';
?>

------解决方案--------------------

探讨

协议就是要来遵守的，如果不遵守，后果的不可预知的。
你能请求成功，但是会让web服务器解析http时乱套,/号和换行符都是重要的符号标志。