How can I find out what my php is?

Question

I am trying to upload a forum onto my website but I have to have a specific php to do so, and I do not know what my php is or how to find out.

Also, is there a way to change or upgrade my php if it is not unstable?

Answer 1

The phpinfo function gives you feedback.

create a new page with this code

<?php phpinfo(); ?>

If it's a home machine you can install a newer version of php on top of the old version.  If you lease a virtual server they usually offer both php4 and php5.  If they only offer php5 your application will probably still work since the two versions are pretty much backwards compatible.

Answer 2

You can print information about your php using a built in function:

phpinfo()

An alternative, to just print the php version is:

// prints e.g. 'Current PHP version: 4.1.1'

echo 'Current PHP version: ' . phpversion();

To update to a newer version of PHP you'll need to contact your webhost, assuming you're using a shared hosting service.

Answer 3

Do you mean the version of PHP, like PHP 4 or PHP 5?

You will have to consult your web host.  If you have a web hosting control panel, you may be able to find out on the cPanel homepage.