Today, I feel like myself to compare about Coldfusion vs PHP. It's for neither debate nor competition. It's just for sharing advantages and disadvantages of them as much as I know.

Coldfusion

Advantages

  • easy to develop
  • easy to use very nice built-in functions
  • easy to integrate with other Adobe's products (flex, air ...)
  • has other CFML servers like Bluedragon and SmithProjects

Disadvantages

  • expensive hosting
  • less resources
  • not wide environment

PHP

Advantages

  • All are free
  • tons of resources
  • wide environment

Disadvantages

  • need to write so many lines
  • not that much easy to integrate with Adobe's products
  • not that much easy to integrate with .NET libraries

Resources : http://stackoverflow.com/questions/234296/coldfusion-vs-php

http://www.adobe.com/devnet/coldfusion/articles/php_cfmx.html