(PECL xdiff >= 1.5.0)
xdiff_string_bdiff — Make binary diff of two strings
$old_data, string $new_data): stringMakes a binary diff of two strings and returns the result. This function works with both text and binary data. Resulting patch can be later applied using xdiff_string_bpatch()/xdiff_file_bpatch().
old_dataFirst string with binary data. It acts as "old" data.
new_dataSecond string with binary data. It acts as "new" data.
Returns string with binary diff containing differences between "old" and "new"
data or false if an internal error occurred.