Indexed and associative Arrays in PHP

<!DOCTYPE html>
<html>
    <body>
        <?php
            $numbers = array(4, 2, 5, 3); //Indexed array
            echo "The first element is " . $numbers[0];
            echo "<br>The number of elements are " . count($numbers);
            rsort($numbers);
            echo "<br>The elements have been sorted in reverse.";
            print_r($numbers);

            $myName = array(); //Associative array
            $myName["first"] = "Shail";
            $myName["middle"] = "R.";
            $myName["last"] = "Shah";
            echo "<br>My last name is " . $myName["last"];

            $myColleges = array("JC" => "Pace", "Engg" => "TSEC");
            echo "<br>I wasted 2 years at " . $myColleges["JC"];
        ?>
    </body>
</html>