xdebug visual studio code using the php debug extension from felix

xdebug

1. Remote VM must have xdebug running

vagrant@app:/etc/php/7.0/fpm$ cat conf.d/20-xdebug.ini
zend_extension=/usr/lib/php/20151012/xdebug.so
xdebug.remote_enable=1
xdebug.remote_autostart=1
xdebug.remote_connect_back=1
xdebug.remote_port=9000

2. VSCode should have the below launch config.  
 launch.json   
      {
            "name": "Listen for XDebug",
            "type": "php",
            "request": "launch",
            "port": 9000,
            "log": true,
            "serverSourceRoot": "/opt/app/vagrant_code",
            "localSourceRoot": "${workspaceRoot}",
            "stopOnEntry": true
        }