How to verify whether DNS is working correctly
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How to install latest PHP 5.4.x on Ubuntu 12
http://www.dev-metal.com/how-to-install-latest-php-5-4-x-on-ubuntu-12-04-lts-precise-pangolin/
PHP code is not being executed, instead code shows on the page
For php7.4 sudo a2enmod proxy_fcgi setenvif sudo a2enconf php7.4-fpm sudo service apache2 restart