How to access a field of a PHP object if the name consists of numbers?

Question

PHP

Hello php progers.
I came across such a problem, after parsing the xml string simplexml_load_string I get such an object prntscr.com/56iw04 how to access properties with such names.
Tried like this

$xml->url[0];
$xml->url['0'];
$xml->url->0;
$xml->url->'0';
$xml->url->{'0'};
$xml->url->{0};

There are 3 cases either NULL or an empty object or an error.

Answer 1

All the task is solved it is necessary to explicitly cast the types (array)$xml->url[0];
I did not know that in php you can cast to an array)))