How to enable background syntax check

How do I enable the ability to do this in Komodo? http://i.imgur.com/2N2dAJx.png

It underlines any syntax errors in read.

Nevermind, I figured it out. I forgot I had to reinstall PHP and Xdebug on my new machine.

sudo apt-get install lamp-server^
sudo apt-get install php5-dev php-pear
sudo aptitude install php5-xdebug