Why did php stop working?

Question

PHP

On an Ubuntu 14.04 laptop asked: - Would you like to upgrade to 16.04?
I want, but why not)) Updated. Among the installed packages, php7 was also installed. Before that, LAMP was installed. Now the local site does not work and the code of php files is displayed in the browser. Someone faced?

Answer 1

Reinstalled Apache and PHP. It is necessary to activate the Apache modules for PHP.

Answer 2

Most likely your php files start with
In recent versions this option is disabled by default and you need to write
Can be disabled in php.ini
php.net/manual/en/ini.core.php#ini.short-open-tag