count

<?

$array_or_countable = array(0, 1, 2);

$return = count($array_or_countable);

echo $return;

?>

3

<?

class myclass implements Countable {
    protected $mycount = 3;

    public function count() {
        return $this->mycount;
    }
}

$array_or_countable = new myclass;

$return = count($array_or_countable);

echo $return;

?>

3

<?

$array_or_countable = false;

$return = count($array_or_countable);

echo $return;

?>

1

<?

$array_or_countable = null;

$return = count($array_or_countable);

echo $return;

?>

0

<?

$array_or_countable = array(0, 1, array(0, 1));
$mode = COUNT_NORMAL;

$return = count($array_or_countable, $mode);

echo $return;

?>

3

<?

$array_or_countable = array(0, 1, array(0, 1));
$mode = COUNT_RECURSIVE;

$return = count($array_or_countable, $mode);

echo $return;

?>

5