Referencia de funciones
PHP Manual

xdiff Functions

Introducción

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

Requisitos

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.

Instalación

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:

Example#1 xdiff install by hand

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

Constantes predefinidas

Estas constantes están definidas por esta extensión y estarán disponibles solamente cuando la extensión ha sido o bien compilada dentro de PHP o grabada dinámicamente en tiempo de ejecución.

XDIFF_PATCH_NORMAL (integer)
XDIFF_PATCH_REVERSE (integer)

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Referencia de funciones
PHP Manual