Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: No such file or directory in /usr/local/lib/php/DB/common.php on line 30

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /usr/local/lib/php/DB/common.php on line 30