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xdiff Functions


xdiff extension creates and applies patches to both text and binary files.


To use xdiff, you will need libxdiff installed, available on the libxdiff homepage »


You'll need at least libxdiff 0.7 for these functions to be aware of memory_limit.


xdiff is currently available through PECL »

If » PEAR is available on your *nix-like system you can use the pear installer to install the xdiff extension, by the following command: pear -v install xdiff.

You can always download the tar.gz package and install xdiff by hand:

Example 2629. xdiff install by hand

gunzip xdiff-xxx.tgz
tar -xvf xdiff-xxx.tar
cd xdiff-xxx
./configure && make && make install

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.


Table of Contents

xdiff_file_diff_binary — Make binary diff of two files
xdiff_file_diff — Make unified diff of two files
xdiff_file_merge3 — Merge 3 files into one
xdiff_file_patch_binary — Patch a file with a binary diff
xdiff_file_patch — Patch a file with an unified diff
xdiff_string_diff_binary — Make binary diff of two strings
xdiff_string_diff — Make unified diff of two strings
xdiff_string_merge3 — Merge 3 strings into one
xdiff_string_patch_binary — Patch a string with a binary diff
xdiff_string_patch — Patch a string with an unified diff