This » PECL extension is not bundled with PHP.
Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: » http://pecl.php.net/package/zookeeper.
To enable zookeeper support, configure with --with-libzookeeper-dir=DIR . DIR is the install prefix of ZooKeeper C Binding, which must contain the include/zookeeper/zookeeper.h
A DLL for this PECL extension is currently unavailable. See also the building on Windows section.