# Sort a multi-dimensional array

I need to sort a multi-dimensional array which represents filesystem structure:

``````Array
(
[dir1] => Array
(
[dir2] => Array
(
[dir3] => Array
(
[dir4] => Array
(
 => file1.php
 => abc.php
)

)

 => file2.php
 => abc.php
)

)

[abc] => Array
(
[abc] => Array
(
[abc] => Array
(
 => file5.php
)

)

)

)
``````

I have no idea what is the algorithm.

## Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

### Solution 1

http://php.net/sort#51088

replace sort(\$a) at the beginning of the mulsort function by ksort(\$a)

EDIT: sorry, just change the mulsort code to :

``````function mulsort(&\$a)
{
ksort(\$a);
foreach(\$a as &\$value)
if (is_array(\$value))
mulsort(\$value);
}
``````

Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂

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