heroku替换新app

我使用的是git bash

Welcome to Git (version 1.8.1.2-preview20130201)
Run 'git help git' to display the help index.
Run 'git help <command>' to display help for specific commands.
Administrator@PC-201208092033 /c/Windows/system32

$ heroku login
Enter your Heroku credentials.
Email: [email protected]
Password (typing will be hidden):
Authentication successful.

$ cd /d/study/heroku/hello_heroku_php/
Administrator@PC-201208092033 /d/study/heroku/hello_heroku_php (master)
$ heroku create
Creating sleepy-harbor-5621... done, stack is cedar
http://sleepy-harbor-5621.herokuapp.com/ | [email protected]:sleepy-harbor-5621.git

Administrator@PC-201208092033 /d/study/heroku/hello_heroku_php (master)
$ git push heroku master 
Warning: Permanently added the RSA host key for IP address '50.19.85.132' to the
 list of known hosts.

 !  No such app as limitless-crag-3058.
#报错没有app：limitless-crag-3058。和上面刚刚创建的app：sleepy-harbor-5621同
#因此我们需要删除之前的app：limitless-crag-3058并使用app：sleepy-harbor-5621替换。
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

$ git remote rm heroku
Administrator@PC-201208092033 /d/study/heroku/hello_heroku_php (master)

$ heroku git:remote -a sleepy-harbor-5621
Git remote heroku added
Administrator@PC-201208092033 /d/study/heroku/hello_heroku_php (master)

$ git push heroku master
Initializing repository, done.
Counting objects: 4, done.
Delta compression using up to 3 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (4/4), 300 bytes, done.
Total 4 (delta 0), reused 0 (delta 0)

-----> PHP app detected

       NOTICE: Your composer.json is completely empty.
       Please change its contents to at least "{}" so it is valid JSON.

-----> No runtime requirements in composer.json, defaulting to PHP 5.5.15.
-----> Installing system packages...
       - PHP 5.5.15
       - Apache 2.4.10
       - Nginx 1.6.0
-----> Installing PHP extensions...
       - opcache (automatic; bundled, using 'ext-opcache.ini')
-----> Installing dependencies...
       Composer version 4ecdbf89c4a3d1e5dfe73c57e3202a5e2a18c87e 2014-07-28 20:1
2:27
       Loading composer repositories with package information
       Installing dependencies
       Nothing to install or update
       Generating optimized autoload files
-----> Preparing runtime environment...
       NOTICE: No Procfile, defaulting to 'web: vendor/bin/heroku-php-apache2'
-----> Discovering process types
       Procfile declares types -> web

-----> Compressing... done, 62.7MB
-----> Launching... done, v3
       http://sleepy-harbor-5621.herokuapp.com/ deployed to Heroku

To [email protected]:sleepy-harbor-5621.git
 * [new branch]      master -> master 
Administrator@PC-201208092033 /d/study/heroku/hello_heroku_php (master)

$ heroku open
Opening sleepy-harbor-5621... done

会打开网页：