Improve and modernize example

Author: ravage84

samples/tutorials/php/Ubuntu/SqlServerSample/connect.php

@@ -1,12 +1,14 @@
 <?php
+    // Setup the connection
     $serverName = "localhost";
-    $connectionOptions = array(
+    $connectionOptions = [
         "Database" => "SampleDB",
         "Uid" => "sa",
         "PWD" => "your_password"
-    );
-    //Establishes the connection
-    $conn = sqlsrv_connect($serverName, $connectionOptions);
-    if($conn)
-        echo "Connected!"
-?>
+    ];
+
+    // Establish the connection
+    $connection = sqlsrv_connect($serverName, $connectionOptions);
+    if ($connection) {
+        echo "Connected!";
+    }