What is the value of this php variable

I’m learning php now and the command array() is confusing me.

$opts = array(
    'apple'=>array(
    'banana'=>"GET",
    'orange'=>"Accept-language: en\r\n" .
              "Cookie: foo=bar\r\n"
  )
  );

I tried to echo opts, but the output was simply the word "ARRAY". I wonder what happened and how was $opts supposed to look like?

>Solution :

use var_dump($array); or print_r($array) instead of echo

https://www.php.net/manual/en/function.var-dump.php