Alerta en PHP
echo '<script>alert("Message")</script>';
Zany Zebra
echo '<script>alert("Message")</script>';echo "<script>alert('error : ".$error."');</script>";echo '<script type="text/javascript">alert("Data has been submitted to ' . $to . '");</script>';
// This is in the PHP file and sends a Javascript alert to the client
$message = "Something";
echo "<script type='text/javascript'>alert('$message');</script>";echo '<script type="text/javascript">alert("'.$error.'");</script>';echo '<script language="javascript">alert("juas");</script>';