What best practices should be followed when sorting and comparing arrays in PHP to ensure accurate results?

When sorting and comparing arrays in PHP, it is important to use the correct comparison operator and sorting function to ensure accurate results. For sorting arrays, the `sort()` function can be used for simple sorting, while `usort()` allows for custom sorting based on a user-defined comparison function. When comparing arrays, the `array_diff()` function can be used to find the differences between two arrays.

// Sorting an array using the sort() function
$numbers = [4, 2, 8, 6];
sort($numbers);
print_r($numbers);

// Custom sorting using usort() function
$fruits = ['apple', 'orange', 'banana'];
usort($fruits, function($a, $b) {
    return strlen($a) - strlen($b);
});
print_r($fruits);

// Comparing arrays using array_diff() function
$array1 = [1, 2, 3];
$array2 = [2, 3, 4];
$diff = array_diff($array1, $array2);
print_r($diff);