<?php

 print "<h2 />Multidimensional Arrays</h2 />";

 $odds = range(1,9,2);

 $A = array(2, 4, 6, $odds, array("this" => "This","is", "a", "test"=>"Test") );

 foreach ($A as $element):
   $t = gettype($element);
   print "$element $t <br />"; //notice: value Array is printed when trying to print a whole array
 endforeach;

 print "<hr />";

 $B = array( array(10, 20, 30), $odds, array(2, 4, 6, 8) );

 foreach ($B as $element)
 {
  foreach ($element as $x)
    print "$x ";

  print "<br />";
 }

 print "<hr />";

 $grades= array ( "Mike" => array ("ex1" => 92, "ex2" => 85, "ex3" => 97),
                  "Jason" => array ("ex1" => 75, "ex2" => 82, "ex3" => 78),
                  "John" => array ("ex1" => 65, "ex2" => 85, "ex3" => 92) );

 //Find the average of all 3 exams for each student

 foreach ($grades as $name => $exams )
 {
   print "$name: ";

   $sum = 0;

   foreach ($exams as $score)
     $sum += $score;

   $average = round($sum / 3, 2); //round average to two significant digits
   print "$average <br />";

 }

?>