Why doesn't the index page open in the browser?

Question

PHP

Hello! I installed virtual box and vagrant, then created a folder on the desktop and created a vagrantfile in it with the vagrant init -m ubuntu/trusty64 command, the contents are

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/trusty64"
end

Then, with the vagrant up command, I launched it all and the box downloaded, the virtual machine started. Added port forwarding

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/trusty64"
  config.vm.network :forwarded_port, guest: 22, host: 8888, host_ip: "127.0.0.1"
end

Reloaded with vagrant reload command.
Created an index.php file at the root with the content "Its run!" and tried to open 127.0.0.1:8888 in the browser , but I get "Page not available". Help me understand what I'm doing wrong?