My hosts PHP choices, which is best?

[K4GAP]

My hosts PHP choices, which is best? Or which should I use and what do i have to do to anything else in preparation for upgrade to 4.2.2 ?



PHP 5.2
All files with the extension .php will be handled by the PHP 5.2 engine.
Legacy PHP with security updates. Compatible with most environments.
PHP 5.2 (Single php.ini)
Same as PHP 5.2, but all subdirectories will use ~/public_html/php.ini

PHP 5.2 (FastCGI)
All files with the extension .php will be handled by PHP 5.2 FastCGI processes.
FastCGI for PHP makes all your PHP applications run through mod_fastcgi instead of mod_suphp. This eliminates the overhead of loading the PHP interpreter on every hit. Since it is always in memory ready for the next hit, the responses will be generated faster.
PHP 5.3
All files with the extension .php will be handled by the PHP 5.3 engine.
Most reliable and compatible version of PHP.

PHP 5.3 (Single php.ini)
Same as PHP 5.3, but all subdirectories will use ~/public_html/php.ini

PHP 5.4
All files with the extension .php will be handled by the PHP 5.4 engine.
Latest version of PHP.

PHP 5.4 (Single php.ini)
Same as PHP 5.4, but all subdirectories will use ~/public_html/php.ini

PHP 5.4 (FastCGI)
All files with the extension .php will be handled by PHP 5.4 FastCGI processes.
FastCGI for PHP makes all your PHP applications run through mod_fastcgi instead of mod_suphp. This eliminates the overhead of loading the PHP interpreter on every hit. Since it is always in memory ready for the next hit, the responses will be generated faster.