PHPBB3 : Install PHPBB3 Not Pass On 16.04

PHPBB3 : Install PHPBB3 Not Pass On 16.04
mbstring.http_input && mbstring.http_output

Problem
When trying to install phpBB3 the installation check fails telling you that

1.    mbstring.http_input must be set to pass
2.     mbstring.http_output must be set to pass

Solution
You will either need to contact the host to alter this in the php.ini as it usually requires root access. However some hosts allow you to have a custom php.ini file in your web root and in this case you can add these lines to the custom php.ini

1. nano /etc/php/7.0/apache2/php.ini

Edit Line This

1. mbstring.http_input = pass
2. mbstring.http_output = pass

Also if your host allows you to have and use .htaccess files to control system variables you might want to try adding these lines to the htacess file.

1. php_value mbstring.http_input pass
2. php_value mbstring.http_output pass

Link : http://www.ktuk.net/phpBB3/viewtopic.php?t=3385