Configuration serveur php avec symfony !

Bonjour,

svp aider moi a corrigé les lignes ou il y a un warning :

ceette page est génée depuis le fichier :
check_configuration.php de symfony

********************************
* *
* symfony requirements check *
* *
********************************

php.ini used by PHP: C:\xampp\php\php.ini


** Mandatory requirements **

OK PHP version is at least 5.2.4 (5.3.8)

** Optional checks **

OK PDO is installed
OK PDO has some drivers installed: mysql, odbc, sqlite, sqlite2
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) ***
[[WARNING]] php.ini has short_open_tag set to off: FAILED
*** Set it to off in php.ini ***
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

PS: j'y suis deja allé dans le fichier de configuration php.ini mais rien a faire les warning ne veulent pas disparraitre aussi j'utilise xampp sous XP

Cordialement