PHP script to send an email

Hi, friends. I own space in Hostgator and recently I have written a PHP script to send emails programmatically.
PHP has a function called mail() which allow you to send email directly from the script.
Syntactically this function looks like mail(to, subject, message, headers, parameters). here headers and parameters are optional.

• to - This parameter takes a string value that is nothing but the email id to which you are sending an email.
• subject - Specifies the subject of the email
• message - This parameter takes a string value that is the message itself.
• headers - Specifies addition information like From, Cc, and Bcc.
• parameters -Specifies an additional parameter to Sendmail program. This can be used to set the envelope sender address when using Sendmail with -f option.  

script:

<?php
$to = "somebody@example.com";
$subject = "My subject";
$txt = "Hello world!";
$headers = "From: webmaster@example.com" . "\r\n" .
"CC: somebodyelse@example.com";

mail($to,$subject,$txt,$headers);
?>

If you are using Hostgator's server space then you have to place this program file inside the root directory of your domain.