Quickly get the SVN revision number at the application level of a ZEND project

Util_Svn.php

<?php

class Util_Svn 
{
    protected static $_revision;

    /**
     * Get the current SVN version at the application path folder
     * 
     * @return string Revision Number
     */
    public static function getRevision() 
    {
        if (!self::$_revision) {
            $revision        = exec('svnversion "' . APPLICATION_PATH . '"');
            self::$_revision = preg_replace('/[^\d]/', '', $revision);
        }

        return self::$_revision;
    }
}