<?php $host="SERVER"; $username="sa"; $password="123456"; $db_name="at17"; $con=sqlsrv_connect($host, $username, $password,$db_name); if(!$con){ die ('<script type="text/javascript">alert("Error Connecting to host")'. mysqli_connect_error($con).'</script>'); } else { //echo( '<script type="text/javascript">alert("Connected")</script>'); } ?>But it displays this error message