Thanks for your question about how PHP 5.3 will affect your Word pages. To be honest, it should have no effect depending on the context- how are you using PHP 5.3 with Word? PHP 5.3 is actually old. The most current version of PHP is 74 -released in Dec 2019. If you can specify what you mean about how PHP 5.3 affects you, then we may be able to give you a more specific answer.
If you have any further questions or comments, please let us know.
Then there should no effect on you with PHP 5.3 if you are not using it.