What is the purpose of the array_differences function in PHP and how does it work?

The purpose of the array_differences function in PHP is to compare two arrays and return the differences between them. This can be useful when you want to find out what elements are present in one array but not in the other. The function works by using the array_diff() function in PHP, which compares the values of two arrays and returns the differences.

function array_differences($array1, $array2) {
    $differences1 = array_diff($array1, $array2);
    $differences2 = array_diff($array2, $array1);
    
    return array_merge($differences1, $differences2);
}

$array1 = [1, 2, 3, 4, 5];
$array2 = [2, 3, 5, 6, 7];

$differences = array_differences($array1, $array2);

print_r($differences); // Output: [1, 4, 6, 7]