通过参数访问php数组子？

Question

I have a unique case where I have an array like so:

$a = array('a' => array('b' => array('c' => 'woohoo!')));

I want to access values of the array in a manner like this:

• some_function($a, array('a')) which would return the array for position a
• some_function($a, array('a', 'b', 'c')) which would return the word 'woohoo'

So basically, it drills down in the array using the passed in variables in the second param and checks for the existence of that key in the result. Any ideas on some native php functions that can help do this? I'm assuming it'll need to make use of recursion. Any thoughts would be really appreciated.

Thanks.

Answer 1

This is untested but you shouldn't need recursion to handle this case:

function getValueByKey($array, $key) {
    foreach ($key as $val) {
        if (!empty($array[$val])) {
            $array = $array[$val];
        } else return false;
    }
    return $array;
}