How can \n be properly interpreted as a line break in an email sent through PHP?

To properly interpret \n as a line break in an email sent through PHP, you can use the PHP function nl2br() to convert newline characters to HTML line breaks. This function will replace all occurrences of \n with <br> tags, ensuring that line breaks are displayed correctly in the email.

$message = "Hello,\nThis is a test email.";
$message = nl2br($message);

// Send email with $message as the body