检查 xDebug 是否已安装.

Check xDebug is installed.

php -m

运行定位xdebug.so

为我返回 /usr/lib/php/20151012/xdebug.so，但 20151012 将来可能会改变.

Returns /usr/lib/php/20151012/xdebug.so for me, but 20151012 might change in the future.

如果 locate 没有返回任何东西或者你刚刚安装了 locate

You have to execute sudo updatedb if locate does not return anything or you've just installed locate