make sure you activate extension=php_intl.dll in:
/etc/php/7.0/apache2/php.ini // ^^^^^^^
and also add the extension uncomment the extension by removing the half-column
The most common way to load a PHP extension is to include it in your php.ini configuration file. Please note that many extensions are already present in your php.ini, and that you only need to remove them with a comma to activate them.
;extension=php_extname.dll
extension=php_extname.dll
after that you will need to restart apache2
sudo service apache2 restart
Update (leave the part above): -
you seem to be using a linux based system specifically debian/ubuntu dist and trying to activate php extension using Windows OS style
to install php intl in debian / ubuntu:
for php 5:
sudo apt-get install php5-intl
and for php 7:
sudo apt-get install php7.0-intl
just enable the extension:
sudo php5enmod intl
or for php7:
sudo phpenmod intl
then restart apache
sudo service apache2 restart
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