Install intl PHP extension OSX High Sierra

Question

How can I install intl PHP extension in PHP 7.1.7, which is delivered with osx high sierra?

Answer 1

I find a solution.

curl -s http://php-osx.liip.ch/install.sh | bash -s 7.1

Then I copied intl.so from the installation to my extension directory, which is defined into my php.ini.