您可以通过引用做到这一点很容易：

You can do that easily with references:

$out = array();
$cur = &$out;
foreach ($array as $value) {
    $cur[$value] = array();
    $cur = &$cur[$value];
}
$cur = null;

印刷 $退出应该给你：

Array
(
    [one] => Array
        (
            [two] => Array
                (
                    [three] => Array
                        (
                            [four] => 
                        )
                )
        )
)