Are there any specific PHP functions or methods that can help in clearing arrays efficiently?

When working with arrays in PHP, it is common to need to clear out all elements from an array efficiently. One way to achieve this is by using the `array_splice()` function, which can remove a portion of an array starting from a specified index. By using `array_splice()` with a start index of 0 and a length equal to the array length, we can effectively clear the entire array.

$array = [1, 2, 3, 4, 5];
array_splice($array, 0); // Clear the array efficiently