質問編集履歴
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PHPで複数のファイルを添付できるSendmailのコードを書いています。添付ファイルを送ることができますが、ファイル名が日本語だとそれが文字化けしていまします。以下のものがこれまでのコードです。
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```PHP
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<?php
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error_reporting(E_ALL);
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ini_set('display_errors', 1);
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mb_internal_encoding ("UTF-8");
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if(isset($_FILES) && (bool) $_FILES) {
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$files = array();
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foreach($_FILES as $name=>$file) {
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$file_name = $file['name'];
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$temp_name = $file['tmp_name'];
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$file_type = $file['type'];
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$path_parts = pathinfo($file_name);
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$ext = $path_parts['extension'];
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array_push($files, $file);
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}
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xxxxx xxxxx xxxxx xxxxx xxxxx xxxxx xxxxx xxxxx
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$to = $_POST['mail_recipient'];
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$cc = $_POST['mail_copy'];
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$bcc = $_POST['mail_bcc'];
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$from = $_POST['mail_sender'];
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$myReturn = $_POST['mail_return'];
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$subject = $_POST['mail_subject'];
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$message = $_POST['mail_message'];
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$returnpath = "-f" . $myReturn;
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$headers = "From: $from\r\n";
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$headers .= "Cc: $cc\r\n";
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$headers .= "Bcc: $bcc";
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// boundary
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$semi_rand = md5(time());
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$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
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// headers for attachment
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$headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\"";
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// multipart boundary
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$message = "This is a multi-part message in MIME format.\n\n" . "--{$mime_boundary}\n" . "Content-Type: text/plain;\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n";
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$message .= "--{$mime_boundary}\n";
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// preparing attachments
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for($x=0; $x<count($files); $x++){
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$file = fopen($files[$x]['tmp_name'], "rb");
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$data = fread($file, filesize($files[$x]['tmp_name']));
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fclose($file);
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$data = chunk_split(base64_encode($data));
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$name = $files[$x]['name'];
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$message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$name\"\n" .
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"Content-Disposition: attachment;\n" . " filename=\"$name\"\n" .
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"Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
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$message .= "--{$mime_boundary}\n";
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}
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// send
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$ok = mail($to, $subject, $message, $headers, $returnpath);
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if ($ok) {
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echo "<p>mail sent to $to!</p>";
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} else {
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echo "<p>mail could not be sent!</p>";
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}
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}
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?>
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```
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例えば、「リスト.txt」というファイルを添付すると、ファイル名が以下の画像にあるように化けてしまいます。
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873bf395314b386d055785a985fb4ffb.jpeg)
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[このStack Overflowのトピック](https://stackoverflow.com/questions/40801570/japanese-email-attachment-names-garbled-php-mail)によると、
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```PHP
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$finame = $filenameattach[$ctrFileName]; mb_internal_encoding ("UTF-8"); $finame = mb_convert_encoding($finame, "utf-8"); $finame = mb_encode_mimeheader($finame);
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```
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のように変更する、とありますが、どうもよくわかりません。自分のコードではどう変更したらファイル名が日本語でもUTF-8で文字変換されるでしょうか？よろしくお願いします。
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