php - 访问类对象属性，如关联数组

so i'm having a php class like the following:

class myClass
{
    function __construct()
    {
        $this->chart_data = array(1,2,3,4,5);
        $this->captions   = array("a", "b", "c", "d", "e");
    }
}

is there a way to access the properties the same way like an associative array, like:

$obj = new myClass();
echo $obj['chart_data'];
echo $obj['captions'];

thanks!

From this answer you can try like this

$obj = (array) new myClass();
print_r($obj);

you can try

echo $obj->{'chart_data'};
echo $obj->{'captions'};