Upgrade built in PHP to version 7 MacOSX
https://php-osx.liip.ch/
run:
$ curl -s https://php-osx.liip.ch/install.sh | bash -s 7.1
if you print php version it will still show the old version and location:
$ php -v
php 5 at /usr/bin/php
then temporarily change bashrc:
export PATH=/usr/local/php5/bin:$PATH
$ source ~/.bashrc
$ sudo apachectl restart
# will output a new location
$ which php
/usr/local/php5/bin/php
# show the new version:
$ php -v
its php 7 now