Compares two arrays and produces a new array of changes between these two arrays. New array will be same level deep as the input arrays, and the deepest value will be ComparedValue, which is an object describing the difference (added, removed, modified).

Optionally, use CompareArrays::Flatten() function to turn diff array into a one dimensional array which will flatten keys into a single path.

Usage:

$Differences = CompareArrays::Diff( $OldArray, $NewArray );
print_r( $Differences );

$Flattened = CompareArrays::Flatten( $Differences );
print_r( $Flattened );