In what ways can the PHP4Apache2.dll file be properly integrated to ensure smooth PHP functionality in Apache?

To properly integrate the PHP4Apache2.dll file for smooth PHP functionality in Apache, you need to ensure that the PHP module is correctly loaded in the Apache configuration file. This can be done by adding the necessary LoadModule and AddType directives to the httpd.conf file. Additionally, you should specify the PHP installation directory in the configuration to point Apache to the PHP4Apache2.dll file. ```apache LoadModule php4_module "path/to/php4apache2.dll" AddType application/x-httpd-php .php PHPIniDir "path/to/php.ini" ```