我的代码从逗号分隔的文件中读取行(电子邮件(并发送电子邮件。它运行良好，我将 r n 用于新行，但是当它发送邮件时，用户接收器 r n 而不是新行。
在emailmessages.csv中，它将阅读
"from","to","subject","message"
"from@example.com","to@example.com","the subject","message is this new line rn endline"
php：代码
$filename = "emailmessages.csv";
$csvArray = ImportCSV2Array($filename);
foreach ($csvArray as $row) {
$to = $row['to'];
$from = $row['from'];
$subject = $row['subject'];
$message = $row['message'];
$headers = "MIME-Version: 1.0" . "rn";
$headers .= "Content-type: text/plain; charset=iso-8859-1" . "rn";
$headers .= "From: $from" . "rn";
mail($to, $subject, $message, $headers);
}
爆炸命令可以帮助我(爆炸$消息？(
我找到了答案
$message = str_replace('rn', "rn", $message);
在大多数情况下呈现为HTML的电子邮件，因此请使用<br/>代替rn：
"from@example.com","to@example.com","the subject","message is this new line <br/> endline"