https://blog.csdn.net/moqiang02/article/details/37347251
wget http://xdebug.org/files/xdebug-2.6.1.tgz
cp xdebug-2.6.1.tgz --target-directory=./xdebug
tar -xzf xdebug-2.6.1.tgz
[xDebug]
zend_extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20151012/xdebug.so