What are some potential pitfalls of using array_keys() in PHP when working with arrays?

When using array_keys() in PHP to get the keys of an array, be cautious of potential pitfalls such as the function returning keys with different data types (e.g., string keys that are numeric values). To ensure consistency, you can use the array_map() function with the strval() function to convert all keys to strings before using them.

// Example code to safely retrieve keys as strings using array_map() and strval()
$array = [1 => 'apple', 2 => 'banana', '3' => 'cherry'];
$keys = array_map('strval', array_keys($array));

print_r($keys);