FastCGI v1.5 Released for IIS 6 and IIS 5.1

I’m pleased to inform you that Microsoft has released FastCGI version 1.5 for IIS 6 and IIS 5.1, as per Ruslan’s posting on up on  FastCGI is the handler for PHP requests on IIS, and now features:

  • Monitor changes to a file (php.ini as an example). Will recycle FastCGI processes for the process pool.

  • Real-time tuning of MaxInstances setting. Set by default now.

  • STDERR stream handling.

  • Sending a termination signal to FastCGI processes for cleaner shutdowns.

  • _FCGI_X_PIPE_ environment variable for communication between the extension and FastCGI process.

  • Relaxed enforcement of response headers syntax.

  • Per-application FastCGI process pools. Allows for two different PHP version used for different applications within the same web site.

  • Using UTF-8 encoding for server variable values.

  • More descriptive error messages

  • Changes in default values for configuration settings.

You can get the latest FastCGI module from the Microsoft Web Platform Installer on


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