Question about upgrading to PHP5

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This Dreamhost support thread was started by on 2010-05-22 01:45:43:

I’m not very familiar with PHP at all. I have a Wordpress.org blog that I host on Dreamhost, and I downloaded a new WP plugin I wanted to use but it gives me an error saying it only works with PHP5 or higher. I checked my domain and I’m currently on PHP4. There’s a drop down where I can choose from the following version 5 choices: - PHP5 CGI - PHP5 FastCGI (recommended) 1) Which one of the above should I pick? (Should I go with the recommended one?) 2) If I upgrade my domain from version 4 to version 5, will this at all break my sites or databases or whatever that use this domain? (ie. my Wordpress blog specifically.) Do I need to do something with my Wordpress blog after I upgrade to a new PHP version to guarantee it’ll work? Thank you, B. Saunders

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