In what scenarios would it be more efficient to use built-in functions or features of a specific system, like OXID, instead of manually merging arrays in PHP?

When working with arrays in PHP, it is often more efficient to use built-in functions or features of a specific system like OXID instead of manually merging arrays. This is because built-in functions are optimized for performance and can handle edge cases more effectively. By leveraging these functions, you can write cleaner and more maintainable code while also reducing the risk of errors.

// Using OXID's array merge function to merge arrays
$mergedArray = oxUtilsArray::arrayMerge($array1, $array2);