What are the common AddType configurations for PHP in Apache and what potential issues can arise from incorrect settings?

When configuring PHP in Apache, the common AddType configurations include: 1. AddType application/x-httpd-php .php 2. AddType application/x-httpd-php-source .phps Potential issues that can arise from incorrect settings include PHP code not being executed by the server, displaying the code as plain text in the browser, or causing errors in the PHP scripts. To fix this issue, ensure that the correct AddType configurations are set in the Apache configuration file (httpd.conf or .htaccess). Here is an example of how to configure AddType for PHP in Apache: ``` AddType application/x-httpd-php .php AddType application/x-httpd-php-source .phps ```