Greetings, I've been looking all over for an answer to this predicament... seamless installation of PHP4 and PHP5 in the same machine... My environment: Windows Enterprise Server 2003 IIS6.0 PHP3.8.9 PHP5.0.1 MYSQL4.0.20d MS SQL2000 I would like to create a nice integration development environment in the same machine that supports IIS -> PHP -> (Mysql or MSSQL) in the same server I've had a very hard time getting PHP4 and PHP5 running concurrently. The closest that I was able to get it was to Unpack all php 4 into c:\httpd\php4 copy all files from c:\httpd\php4\sapi\* and dll\* into c:httpd\php4 directory (i.e. move up one directory) Unpack all php 5 into c:\httpd\php5 Set the administration PATH env variable to PATH=...;c:\httpd\php5\;c:\httpd\php4 Go to IIS -> Web Service Extensions - > Add New Extension (1) for PHP pointing to c:\httpd\php4\php4isapi.dll and (2) for PHP5 pointing to c:\httpd\php5\php5isapi.dll Go to IIS -> Web Sites -> [Properties] -> Home Directory -> Configuration... -> add mappings .php5 to php5isapi.dll and .php to php5isapi.dll edit php.ini-recommended on each directory (i.e. php4 and php5) only uncommented several dynamic extensions and, cgi.force_redirect = 0, and extension_dir = "c:\httpd\[php4 | php5]\ext\" Cold boot While I can get both php to respond correctly, I cannot see any dynamic extensions loaded. Qustions: Under the above arrangement which php.ini is being use for php5? At one point I deleted php.ini and it made no difference. I have opted to set PHPRC = c:\httpd\php5 which does ready the php.ini and loads my extension correctly. However I break php4. What to do? Many thanks for any insight into this... Orlando -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php