How can multiple arrays be compared and merged in PHP while maintaining the order of values?

When comparing and merging multiple arrays in PHP while maintaining the order of values, you can achieve this by using the array_merge function followed by array_unique to remove any duplicate values. To maintain the order of values, you can use the array_merge function in combination with the "+" operator to merge the arrays without reordering the values.

$array1 = [1, 2, 3];
$array2 = [3, 4, 5];
$array3 = [5, 6, 7];

$mergedArray = array_values(array_unique(array_merge($array1, $array2, $array3)));

print_r($mergedArray);