find the kth largest key in a map in php

To find the kth largest key in a map in PHP, you can follow these steps:

1. Get the keys of the map in an array using the array_keys function.
2. Sort the array of keys in descending order using the rsort function.
3. Access the kth element of the sorted array of keys, which will correspond to the kth largest key in the map.

Here's the PHP code:

main.php
function findKthLargestKey($map, $k) {
    $keys = array_keys($map);
    rsort($keys);
    return $keys[$k-1];
}
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You can use this function like this:

main.php
$map = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4);
$k = 2; // find the 2nd largest key
$kthLargestKey = findKthLargestKey($map, $k);
echo $kthLargestKey; // output: 'c'
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