If you get a message like this:
"Php Startup: Unable to load dynamic library 'C:\php\ext\php_pgsql.dll"
1. In the Configuration File alter the order of the libraries "php_exif.dll" and "php_mbstring.dll", in such a way that is called first the library "php_mbstring.dll"
2. Copy all the libraries in the folder "bin" of your installation of PostgreSQL and paste them into the root folder of Windows
3. Uncomment the line "extension=php_pgsql.dll"
4. Now you should see on the page generated by "phpinfo()" section of PostgreSQL