<?php $test = 'test1/test2/test3/test4'; $t = ""; foreach($arr as $value) { $t .= "/".$value; $newArray[] = $t; } ?>
Standard input is empty
Array
(
[0] => /test1
[1] => /test1/test2
[2] => /test1/test2/test3
[3] => /test1/test2/test3/test4
)