How to allow crawlers access to index.php only, using robots.txt?

Question

If i want to only allow crawlers to access index.php, will this work?

User-agent: *
Disallow: /
Allow: /index.php

Answer 1

User-agent: *
Allow: /$
Allow: /index.php
Allow: /sitemap.xml
Allow: /robots.txt
Disallow: /

Sitemap: http://www.your-site-name.com/sitemap.xml

Answer 2

Try swapping the order of Disallow / Allow:

User-agent: *
Allow: /index.php
Disallow: /

See this info from wikipedia:

"Yet, in order to be compatible to all robots, if you want to allow single files inside an otherwise disallowed directory, you need to place the Allow directive(s) first, followed by the Disallow, for example:"

http://en.wikipedia.org/wiki/Robots.txt

Still I wouldn't expect it to work too consistently