如何在php中的类方法中返回数组长度？

Question

I have an array:

$data = array("a", "b", "c");

I'm trying to print out the length of this array (3) in a class method

class MyString {
    public $myChars;
    public $length;

    function __construct($data) {
        $this->myChars = $data;
    }

    function length() {
        $length = count($this->myChars);
        return $length;
    }

Calling it from:

$mystring = new MyString($data);

But this doesn't work...

Answer 1

$mystring = new MyString($data);
print $mystring->length();