php 发送带pdf附件的email 出现的是一长串字符串请教怎么解决

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Release： 2016-06-13 12:37:09

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php 发送带pdf附件的email 出现的是一长串字符串请问如何解决
RT，发出的email附件不是一个pdf档，而变成了一长串字符串，

我的发送email的代码如下：

function mail($mailto, $userid, $data){
    global $dsql,$cfg_adminemail,$cfg_webname,$cfg_basehost,$cfg_memberurl;
    $mailtitle = $cfg_webname.":通知";
$file=fopen("D:/xampp/htdocs/pdftemp/dsfasdf.pdf","r");
$fileName=$data['oid'].'.pdf';
$mimeType ="application/pdf";
$boundary = "nextpart_".uniqid("");  //分隔符1
$boundary2 = "nextpart2_".uniqid(""); //分隔符2

        //email头
$headers = "From: ".$cfg_adminemail."\r\nReply-To: $cfg_adminemail";
$headers .= "Content-type: multipart/mixed; boundary=\"$boundary1\"\r\n";

        //读取文件
        $read = fread($file, filesize("D:/xampp/htdocs/pdftemp/dsfasdf.pdf"));
//我们用base64方法把它编码
$read = base64_encode($read);
//把这个长字符串切成由每行76个字符组成的小块
$read = chunk_split($read);

        //以下是mailbody正文
$mailbody = "--$boundary1----$boundary2
Content-type: text/plain;charset=iso-8859-1;
Content-transfer-encoding: 8bit";
    $mailbody .= '致： '.$userid.',

This is mailbody--$boundary2--';

        //以下是附件部分
$mailbody .="--$boundary1
Content-type: text/html; name=$fileName
Content-disposition: inline; filename=$fileName
Content-transfer-encoding: 8bit
$read
--$boundary1--";

    $status = smail($mailto,$mailtitle,$mailbody,$headers);
    setMail($mailto, $mailtitle, $mailbody, $headers, $status);
    return $status;
}