migrate a PHP app from apache to IIS [closed]

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I want migrate a PHP app from apache to IIS.

Is there any incompatibility between theme? (Do I need to modify my app before migration?)

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PHP incompatabilities? Only if you're code accesses the PHP apache bindings.

But there are a lot of subtke differences in the way IIS behaves compared with other webservers on the same OS (tunnelling NTLM to network drive access is a corker).