What are common challenges when setting up PHP on Windows XP with Apache?

One common challenge when setting up PHP on Windows XP with Apache is ensuring that the correct PHP module is loaded in the Apache configuration file. To solve this, you need to add the necessary lines to the Apache configuration file to load the PHP module. ```apache LoadModule php_module "C:/path/to/php/php7apache2_4.dll" AddHandler application/x-httpd-php .php PHPIniDir "C:/path/to/php" ```