What considerations should be made when storing PHP code in files with non-standard extensions like .htm or .html?

When storing PHP code in files with non-standard extensions like .htm or .html, it is important to configure the web server to treat those files as PHP files. This can be done by adding a directive in the server configuration file to parse files with those extensions as PHP scripts. Additionally, it is important to ensure that the PHP code is properly enclosed within <?php ?> tags to be executed by the PHP interpreter. ```apache <IfModule mod_php5.c> AddType application/x-httpd-php .html .htm AddHandler application/x-httpd-php .html .htm </IfModule> ```