Solve problems that curl can not be found when install php-yar

Today I found a problem that curl can not be found when I install the php-yar. I am using the ubuntu os, and the output is `Please reinstall the libcurl distribution – easy.h should be in /include/curl/`

The solution is:

sudo apt-get install libcurl4-gnutls-dev
sudo apt-get install php7.0-curl
cd /usr/local/include
sudo ln -s /usr/include/x86_64-linux-gnu/curl curl