PECL xdiff >= 1.5.0
xdiff_string_bdiff - Make binary diff of two strings
xdiff_string_bdiff( string$old_data, string$new_data ): string
Makes 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.
First string with binary data. It acts as "old" data.
Second 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.