$current_issue = [ 'volume' => '', 'issue' => '', 'publication_date' => '', 'year' => '', 'cover_image' => '', 'description' => '' ]; $current_issue_articles = [ [ 'article_number' => '01', 'title' => '', 'article_type' => '', 'authors' => '', 'pages' => '', 'doi' => '', 'pdf' => '', 'abstract' => '' ], [ 'article_number' => '02', 'title' => '', 'article_type' => '', 'authors' => '', 'pages' => '', 'doi' => '', 'pdf' => '', 'abstract' => '' ] ]; ?>