how to send a message using php code example

Example 1: alert in php

echo '<script>alert("Message")</script>';

Example 2: php mail success message

if(mail($ToEmail, $EmailSubject, $MESSAGE_BODY, $mailheader))
      {
      echo "<script>document.location.href='contact.php'</script>";
      }
      else
      {
      echo "<script>alert('Mail was not sent. Please try again later');</script>";
      }
     }