how to get multi-dimensional array data with another one-dimension array - php

Question

What I'd like to do is have a function that accepts two arguments, both arrays, the first being a one-dimensional array of varying lengths and the second is a multi-dimensional array of varying depths and lengths. The first array is never associative, the second is always a fully associative array.
This function would return the requested value from the multi-dimensional array as indicated by the first array.
Assume that the first array will always be hand-written and passed to this function. Meaning the developer always knows there is a value to be returned from the multi-dimensional array and would never pass a request to the function where a value did not exist.
I think the code below is the best example at what I'm trying to achieve.
//Example multi-dimensional array
$multi = array(
'fruit' => array(
'red' => array(
'strawberries' => '$2.99/lb',
'apples' => '$1.99/lb'
),
'green' => array(
'honeydew' => '$3.39/lb',
'limes' => '$0.75/lb'
)
),
'vegetables' => array(
'yellow' => array(
'squash' => '$1.29/lb',
'bellpepper' => '$0.99/lb'
),
'purple' => array(
'eggplant' => '$2.39/lb'
)
),
'weeklypromo' => '15% off',
'subscribers' => array(
'user1#email.com' => 'User 1',
'user2#email.com' => 'User 2',
'user3#email.com' => 'User 3',
'user4#email.com' => 'User 4'
)
);
//Example one-dimensional array
$single = array('fruit', 'red', 'apples');
function magicfunc($single, $multi) {
//some magic here that looks something like below
$magic_value = $multi[$single[0]][$single[1]][$single[2]];
return $magic_value;
}
//Examples:
print magicfunc(array('fruit', 'red', 'apples'), $multi);
Output:
$1.99/lb
print magicfunc(array('subscribers', 'user3#email.com'), $multi);
Output:
User 3
print magicfunc(array('weeklypromo'), $multi);
Output:
15% off

Answer 1

This returns the values as requested:
function magicfunc($single, $multi) {
while (true) {
if (!$single) {
break;
}
$searchIndex = array_shift($single);
foreach ($multi as $k => $val) {
if ($k == $searchIndex) {
$multi = $val;
continue 2;
}
}
}
return $multi;
}