I would like to be able to port some new site pages over to PHP using the same db as in the coldfusion site. Is it possible to have PHP run pages in say other directory and
As others have said, yes, it is possible. Your configuration doesn't really matter, (unless you're looking for help getting it setup), because it can be done on any modern webserver (Apache, IIS, etc).
Something to think about, though, is the default document. If your web application uses urls like:
http://example.com/myApp/ (no index.cfm or index.php in the url)
Then you need to be aware of the explicit order of default documents. If you have both an index.php and an index.cfm template in the same directory, which will execute?
If your default document list is (a variation of):
index.cfm index.php default.aspx index.html
Then the ColdFusion page will be the one to execute. On the other hand, if the default document list is (a variation of):
index.php index.cfm default.aspx index.html
Then the PHP page will be the one to execute.