xdiff_file_diff Make unified diff of two files boolxdiff_file_diff stringfile1 stringfile2 stringdest intcontext boolminimal xdiff_file_diff makes unified diff of files file1 and file2 and stores result in file dest. context indicated how many lines of context you want to include in diff result. Set minimal to &true; if you want to minimalize size of diff (can take a long time). Resulting file is human-readable. This function doesn't work well with binary files. To make diff of binary files use xdiff_file_diff_binary. &return.success; The following code makes unified diff of two php files. ]]> See also xdiff_string_diff.