lmao, when php.net says:

Quote
Support for PHP 4 has been discontinued since 2007-12-31. Please consider upgrading to PHP 5.2. The release below is the last PHP 4 release.
i see no reason to not be in the 5s for php..

and mysql 5x has been official since 2003 ?

and apache 2x is also mature, it would be a one time thing to using better versions of each.. so 'every time' is really a one shot dealio, imo..

now, it might be debateable as to 'time' or 'if you can' -- i'll give you that.. but 'every time' is a stretch..