PHP SQL BASIC

<?php



$con = mysql_connect("localhost","root","");

if(!$con){
  die("Unable connect to mysql server");
}

mysql_select_db("test",$con);

//$sql = "CREATE TABLE employee(name varchar(255),age int(11),salary DOUBLE);";
//$sql = "INSERT INTO employee (name,age,salary) VALUES('Touhid',25,10000.50)";

$sql = "SELECT * FROM employee";
$query = mysql_query($sql,$con);
echo "<table border=\"1\">";
while($row = mysql_fetch_array($query)){
 echo "<tr><td>{$row['name']}</td><td>{$row['age']}</td><td>{$row['salary']}</td></tr>\n";
}
echo "</table>";

if(!$query){
    echo mysql_error();
}else{
echo "Query Successful";
}

mysql_close($con);