This app is an example of implementing Shunting-yard algorithm in PHP. I'm also providing a simple user interface based on Nette controls. All commands below are executable in Bash.
Clone this repo into your directory.
$ composer install
Create writable directories temp/ and log/.
$ chmod -R a+rw temp log
# if you are using selinux run this
$ chcon -R -t httpd_sys_content_rw_t temp log
Create an empty config.local.neon file
$ touch app/config/config.local.neon
Open your project in web browser and you should see calc interface.
$ sh tests.sh