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@ 2017-10-06T11:15:07Z

<?php
$nested_array = array();
                    $temp = &$nested_array;
$item = 'brachA-branchB-branchC';

     foreach (explode('-', $item) as $key => $value) {
              $temp = &$temp[$value];
     }

     print_r($nested_array);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
explode: documentation ( source)

preferences:dark modelive preview

61.65 ms | 405 KiB | 5 Q