I have a hard time to find exact method to install PHP intl extension in Ubuntu 14.04.
I tried with sudo apt-get install php5-intl
but
you could search with
aptitude search intl
after you can choose the right one, for example
sudo aptitude install php-intl
and finally
sudo service apache2 restart
good Luck!
sudo apt-get install php-intl
then restart your server
install it from terminal
sudo apt-get install php-intl
For php5 on Ubuntu 14.04
sudo apt-get install php5-intl
For php7 on Ubuntu 16.04
sudo apt-get install php7.0-intl
For php7.2 on Ubuntu 18.04
sudo apt-get install php7.2-intl
Anyway restart your apache after
sudo service apache2 restart
IMPORTANT NOTE: Keep in mind that your php in your terminal/command line has NOTHING todo with the php used by the apache webserver!
If the extension is already installed you should try to enable it. Either in the php.ini file or from command line.
Syntax:
php:
phpenmod [mod name]
apache:
a2enmod [mod name]
For php 5.6 on ubuntu 16.04
sudo apt-get install php5.6-intl
May be universe repository is disabled, here is your package in it
Enable it
sudo add-apt-repository universe
Update
sudo apt-get update
And install
sudo apt-get install php5-intl