我在http://symfony.com/legacy/doc/jobeet/1_4/en/01?orm=Doctrine学习symfony，
但有一些问题想向各位前辈们指教
我按照那个教学的指示，在http://sf-to.org/1.4/check.php下载了
check_configuration.php，并在我的网站上执行以便检查我的执行环境
，出现了以下讯息：
********************************
* *
* symfony requirements check *
* *
********************************
php.ini used by PHP: C:\wamp\bin\apache\apache2.2.22\bin\php.ini
** Mandatory requirements **
OK PHP version is at least 5.2.4 (5.3.13)
** Optional checks **
OK PDO is installed
OK PDO has some drivers installed: mysql, sqlite
OK PHP-XML module is installed
[[WARNING]] XSL module is installed: FAILED
*** Install and enable the XSL module (recommended for Propel) ***
OK The token_get_all() function is available
OK The mb_strlen() function is available
OK The iconv() function is available
OK The utf8_decode() is available
[[WARNING]] The posix_isatty() is available: FAILED
*** Install and enable the php_posix extension (used to colorized the CLI output) ***
[[WARNING]] A PHP accelerator is installed: FAILED
*** Install a PHP accelerator like APC (highly recommended) ***
OK php.ini has short_open_tag set to off
OK php.ini has magic_quotes_gpc set to off
OK php.ini has register_globals set to off
OK php.ini has session.auto_start set to off
OK PHP version is not 5.2.9
其中出现了WARNING的部分，我不知道该如何解决
1.去哪里下载XSL module、php_posix extension、APC