致命错误：不能将stdClass类型的对象用作带有db项的数组的数组

I am trying to read through an array in the same way I do many other times on my site. This one is giving me the Fatal error: Cannot use object of type stdClass as array. In my class I have:

public $productlist = array();
//GetFeatured 
while($obj = $result->fetch_object()){
$this->productlist[] = $obj;
}

In my page I am trying to display it:

$prod = new product;
$prod->GetFeatured();
for($ind = 0; $ind <= count($prod->productlist) - 1; $ind++){
echo $prod->productlist[$ind]['productid'];
}

This populates the array but I am not sure why I am getting this error. Any help is greatly appreciated.

You are fetching as object here:

while($obj = $result->fetch_object()){

then trying to access as array here:

echo $prod->productlist[$ind]['productid'];

Try it like this:

echo $prod->productlist[$ind]->productid;

Another way is using fetch_assoc at the place of fetch_object

while($obj = $result->fetch_assoc()){

then this stays like this:

echo $prod->productlist[$ind]['productid'];

If you like to get data from object in array style your class needs to implement the ArrayAccess interface