What are some best practices for dynamically creating email headers in PHP?

When dynamically creating email headers in PHP, it's important to ensure that the headers are properly formatted to comply with email standards. One common best practice is to use the PHP `mail` function along with the `headers` parameter to set headers such as From, Reply-To, and Content-Type. 

$to = "recipient@example.com";
$subject = "Subject of the email";
$message = "This is the message content of the email";

$headers = "From: sender@example.com\r\n";
$headers .= "Reply-To: replyto@example.com\r\n";
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";

mail($to, $subject, $message, $headers);

Keywords

PHP email headers dynamic best practices coding conventions

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