To use xdiff, you will need libxdiff installed, available on the libxdiff homepage » http://www.xmailserver.org/xdiff-lib.html.
Note: You'll need at least libxdiff 0.7 for these functions to be aware of memory_limit.
Note:
You'll need at least libxdiff 0.7 for these functions to be aware of memory_limit.