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发附件有关问题，mb_send_mail不可以，mail可以，为啥

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互联网集市收集整理的这篇技术教程文章主要介绍了发附件有关问题，mb_send_mail不可以，mail可以，为啥，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含2273字，纯文字阅读大概需要4分钟。

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发附件问题，mb_send_mail不可以，mail可以，为啥？
很着急啊，
求解。
谢谢先
以下是我的程序：

$from .= " <[email protected]> ";

$to .= " <[email protected]> ";

$subject = "添付ファイルテスト ";
$body = "添付ファイルテスト正文 ";

$filename = "/work/cgi-bin/prs/test.txt ";
$att_files = "/work/cgi-bin/prs/テストファイル.txt ";
//$mine = "js ";

//send_mail2($to, $subject, $text_body, $headers, $html_body= " ", $att_names= " ", $att_files= " ", $file_types= " ");
/*
if ($filename){
($attach = file_get_contents($filename)) Or die( "Open Error: $filename ");
$filename = basename($filename);
$ret = Attach_Mail($from, $to, $subject, $body, $filename, $attach, $mine);
}else{

}
*/
$ret = send_mail($to, $from, $subject, $body, $cc = null, $bcc = null, $filename);
//echo $ret;

function send_mail($to, $from, $subject, $body, $cc = null, $bcc = null, $attachment = null)
{
if ($to != " " && isset( $to ) ) {
$to =str_replace( " " , " " , $to ) ;
$to =str_replace( "\t " , ", " , $to ) ;
}
if ($cc != " " && isset( $cc ) ) {
$cc =str_replace( " " , " " , $cc ) ;
$cc =str_replace( "\t " , ", " , $cc ) ;
}
if ($bcc != " " && isset( $bcc ) ) {
$bcc =str_replace( " " , " " , $bcc ) ;
$bcc =str_replace( "\t " , ", " , $bcc ) ;
}

// 念の為、言語と文字コードの設定
$body = "BCC:$bcc\r\n$body\r\n ";
$body = "CC:$cc\r\n$body\r\n ";
$to_tmp = join( "\r\n ",explode( ", ",$to));
$body = "TO:$to_tmp\r\n$body\r\n ";

mb_language( "Japanese ");
mb_internal_encoding( "EUC-JP ");
mb_detect_order( "ASCII, JIS, UTF-8, EUC-JP, SJIS ");

// From を変換
//$FromName = mb_encode_mimeheader(mb_convert_encoding($FromName, 'JIS ', 'auto '));
//$header .= 'From: '.$FromName. ' < '.$FromMail. '> '. "\r\n ";
$to = "[email protected] ";

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