The foreach loops are useful with maps.
The order in which PHP iterates the array will be the same order that you used to insert the contents in the array.
<?php $books = [ /*w w w . ja va 2s . co m*/ [ 'title' => 'Java Tutorial', 'author' => 'Jason', 'available' => true, 'pages' => 336, 'isbn' => 000001 ], [ 'title' => '2018', 'author' => 'C', 'available' => true, 'pages' => 267, 'isbn' => 0002 ], [ 'title' => 'Javascript', 'author' => 'Gason', 'available' => false, 'pages' => 457, 'isbn' => 0003 ], ]; foreach ($books as $book){ echo $book['title'] . '\n'; echo $book['author'] . '\n'; if (!$book['available']){ echo 'Not available' . '\n'; } } ?>