Warning: require_once(PEAR/PackageFileManager2.php): failed to open stream: No such file or directory in C:\phpStudy\WWW\mch\vendor\ezyang\htmlpurifier\package.php on line 5

Fatal error: require_once(): Failed opening required 'PEAR/PackageFileManager2.php' (include_path='.;C:\php\pear') in C:\phpStudy\WWW\mch\vendor\ezyang\htmlpurifier\package.php on line 5