I've seen some variants on this question but I believe this one hasn't been answered yet.

I need to get the starting date and ending date of a week, chosen by year and week number (not a date)

example:

input:

```
getStartAndEndDate($week, $year);

```

output:

```
$return[0] = $firstDay;
$return[1] = $lastDay;

```

The return value will be something like an array in which the first entry is the week starting date and the second being the ending date.

OPTIONAL: while we are at it, the date format needs to be `Y-n-j` (normal date format, no leading zeros.

I've tried editing existing functions that almost did what I wanted but I had no luck so far.

Please help me out, thanks in advance.