Ok I have this kind of associative array in PHP

```
$arr = array(
    "fruit_aac" => "apple",
    "fruit_2de" => "banana",
    "fruit_ade" => "grapes",
    "other_add" => "sugar",
    "other_nut" => "coconut",
);

```

now what I want is to select only the elements that starts with key `fruit_`. How can be this possible? can I use a regex? or any PHP array functions available? Is there any workaround? Please give some examples for your solutions