似乎不再支持此命令..有没有人替换它？
root@0ffa76c2d4e4:/home/# sudo apt-get install php5-xdebug
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package php5-xdebug is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'php5-xdebug' has no installation candidate