Prepend all preceding values to each element of an array

Question

I have an array like this (one dimension only):

$arr = array('one', 'two', 'three', 'foo', 'bar', 'etc');

Now I need a for() loop that creates a new array from $arr, like that:

$newArr = array('one', 'onetwo', 'onetwothree', 'onetwothreefoo', 'onetwothreefoobar', 'onetwothreefoobaretc');

Seems to be simple but I can't figure it out.

Thanks in advance!

Answer 1

$mash = "";
$res = array();

foreach ($arr as $el) {
    $mash .= $el;
    array_push($res, $mash);
}