How to make 'opportunities' have an array?

Question

PHP

$opportunies = [
  [0]=>
  string(12) "Postdoctoral"
  [1]=>
  string(8) "Research"
]
 $announcementsArray['data'][] = [
                'title' => $title,
                'opportunities' => $opportunities,
                'study_levels' => $studyLevel,
            ];

Answer 1

It's probably worth renaming the array variable $opportuniesto $opportunities
Well or assign it $opportuniesinstead $opportunities
=))