symfony requirements check

Salut,

J'essaie d'installer Symphony, donc après avoir téléchargé ce fichier pour me dire si les éléments nécessaires sont installés :

http://sf-to.org/1.4/check.php

le résultat est :

********************************
*                              *
*  symfony requirements check  *
*                              *
********************************
php.ini used by PHP: C:\wamp\bin\apache\Apache2.2.11\bin\php.ini
** Mandatory requirements **
OK        PHP version is at least 5.2.4 (5.3.0)
** 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

Donc, comment faire pour installer les 3 éléments menquants ? XSL module,posix_isatty(), PHP accelerator

le code affiché, et les éléments manquants :

********************************
*                              *
*  symfony requirements check  *
*                              *
********************************
php.ini used by PHP: C:\wamp\bin\apache\Apache2.2.11\bin\php.ini
** Mandatory requirements **
OK        PHP version is at least 5.2.4 (5.3.0)
** 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

As-tu jeté un coup d'oeil à ton php.ini et accessoirement à la documentation de PHP sur ces différents éléments ?

Salut,

Je commence à apprendre php, donc je ne sais pas ce que ces éléments signifient vraiment.

où je peux trouver cette documentation php ?

Merci.