$tree = new SplTree(); $tree->insert('apple'); $tree->insert('banana'); $tree->insert('cherry');
$stack = array(); array_push($stack, 'apple'); array_push($stack, 'banana'); array_push($stack, 'cherry'); Php 7 Data Structures And Algorithms Pdf Free Download -BEST
$queue = array(); array_push($queue, 'apple'); array_push($queue, 'banana'); array_push($queue, 'cherry'); $tree = new SplTree()