What is the significance of removing the comma after the variable $on in the PHP script for sending newsletters?

The significance of removing the comma after the variable $on in the PHP script for sending newsletters is that it prevents syntax errors in the code. When using the mail() function in PHP to send emails, the parameters should be separated by commas without any additional punctuation. Therefore, removing the comma after $on ensures that the code runs without any issues. 

$to = "recipient@example.com";
$subject = "Newsletter";
$message = "This is a newsletter message.";
$headers = "From: sender@example.com";

$on = "Content-Type: text/html; charset=UTF-8"; // Removed the comma after $on

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

Keywords

variable PHP script sending newsletters syntax error debugging

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