This worked for my in php7
aptitude install php-pear
aptitude install php7-dev
aptitude reinstall lua5.2
aptitude reinstall liblua5.2-0
aptitude reinstall liblua5.2-dev
cp /usr/include/lua5.2/lua.h /usr/include
sudo ln -s /usr/include/lua*.*/ /usr/include/lua
sudo cp /usr/lib/x86_64-linux-gnu/liblua5.2.a /usr/lib/liblua.a
sudo cp /usr/lib/x86_64-linux-gnu/liblua5.2.so /usr/lib/liblua.so
sudo pecl install lua-2.0.2