ICU version compatibility Symfony 3.1
I presume you get this when you run:
php bin/symfony_requirementsThis is just a warning and you can safely ignore the message. I've response to similar questions on this. See this URL for more details:
To install ICU 57.1 run:
curl -sS -o /tmp/icu.tar.gz -L http://download.icu-project.org/files/icu4c/57.1/icu4c-57_1-src.tgz && tar -zxf /tmp/icu.tar.gz -C /tmp && cd /tmp/icu/source && ./configure --prefix=/usr/local && make && make install
run
curl -sS -o /tmp/icu.tar.gz -L http://download.icu-project.org/files/icu4c/57.1/icu4c-57_1-src.tgz && tar -zxf /tmp/icu.tar.gz -C /tmp && cd /tmp/icu/source && ./configure --prefix=/usr/local && make && sudo make installthan run
sudo pecl install intl