​x
 
<!DOCTYPE html>
<html>
<body>
​
<?php
$cars=array
  (
  "Volvo"=>array
  (
  "XC60",
  "XC90"
  ),
  "BMW"=>array
  (
  "X3",
  "X5"
  ),
  "Toyota"=>array
  (
  "Highlander"
  )
  );
​
echo "常规计数：" . sizeof($cars)."<br>";
echo "递归计数：" . sizeof($cars,1);
?>
​
</body>
</html>
​