An implementation of most of the Arduino Wiring functions for the Raspberry Pi
You will need to clone this repository with the --recursive flag on git clone as it contains WiringPi as a submodule.
You will need to first install php-dev or php7-dev
Then
make
This will give you a build folder with the wiringpi.so module, this needs to go in the relevant folder of your PHP installation.
Most likely somewhere in /usr/lib/php7/
Alternatively you can:
sudo make install
This will additionally copy wiringpi.php
which you can include with:
include(ini_get('extension_dir') . '/wiringpi.php');
To choose the pin mapping type that you wish to use, create an ini file /etc/php7/conf.d/wiringpi.ini and adding the following:
extension=wiringpi.so
wiringpi.pinmaptype=[PINS|GPIO|USER]
To avoid having to change the www-data user to root, you can add it to the relevant groups:
sudo adduser www-data i2c
sudo adduser www-data spi
sudo adduser www-data gpio