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/phar.
To install on Windows, follow the instructions above, modify your php.ini and restart your web server.
extension_dir=c:/php5/exts/ extension=php_phar.dll ;; optional extensions extension=php_bz2.dll
Since PHP 5.3.0, Phar extension is built-in, no DLL is needed.