To use xdiff, you will need libxdiff installed, available on the libxdiff homepage » http://www.xmailserver.org/xdiff-lib.html.
You'll need at least libxdiff 0.7 for these functions to be aware of memory_limit.
xdiff is currently available through PECL » http://pecl.php.net/package/xdiff.
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:
tar -xvf xdiff-xxx.tar
./configure && make && make install
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