Listing PHP & MySQL database

<?php
//try connect to database
$db=mysqli_connect("localhost","root","",
"mycompanyhr");

//if db setting incorrect
if (mysqli_connect_errno($db)) {
 echo "Connect failed: ". mysqli_connect_error($db);
 exit();
}
else{//if db no problems
	echo "Database connected<br>";
	//sql query
	$sql="select EMPNO, FIRSTNAME, LASTNAME, PHONENO
	from employee";
	//execute sql query
	$qr=mysqli_query($db, $sql);
	//fetch one record
	while ($record=mysqli_fetch_array($qr)){
		//display record content
		echo "Employe ID ".$record['EMPNO']."<br>";
		echo "Firstname ".$record['FIRSTNAME']."<hr>";
	}//display all using while loop

}
?>