Cloud9 core plugin for Xdebug and other DBGP debuggers.
to install xdebug for php use
sudo apt-get update
sudo apt-get install -y php5-dev
sudo pecl install xdebug
sudo mkdir -p /etc/php5/mods-available
echo "; Xdebug extension installed by Cloud9
zend_extension=xdebug.so
xdebug.remote_enable=1
" | sudo tee --append /etc/php5/mods-available/xdebug.ini
sudo php5enmod xdebugCopyright (c) 2015 Ajax.org B.V.