How to check the key of next index of arrays in php?

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$array = ['apple' => 10, 'orange' => 20, 'banana' => 30];

// Get the current key
$currentKey = key($array);
echo "Current Key: " . $currentKey . PHP_EOL; // Output: apple

// Move the internal pointer to the next element
next($array);

// Get the key of the next index
$nextKey = key($array);
echo "Next Key: " . $nextKey . PHP_EOL; // Output: orange