Why doesn't php7 work in ubuntu?

Question

PHP

Installed apache2 and php7.1 on ubuntu 16.04. I created a test.php file, entered phpinfo(); there, it just shows a blank page in the browser. Help, I'm new to Linux

Answer 1

Remove everything from the video tutorial and install lamp as I wrote here .
After that, everything will work for you.

Answer 2

it is not enough information
1) you registered virtualhost? link how do you access the file?
2) I hope you do? <?php phpinfo(); ?>

Answer 3

in php.ini by default
short_open_tag = off
change to
short_open_tag = on or write <?php
in the beginning of the script file