PHP 7.1.0 Released

fastcgi_finish_request

(PHP 5 >= 5.3.3, PHP 7)

fastcgi_finish_requestFlushes all response data to the client

Description

boolean fastcgi_finish_request ( void )

This function flushes all response data to the client and finishes the request. This allows for time consuming tasks to be performed without leaving the connection to the client open.

Return Values

Returns TRUE on success or FALSE on failure.

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User Contributed Notes 1 note

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tuxrampage
3 months ago
There are some pitfalls  you should be aware of when using this function.

The script will still occupy a FPM process after fastcgi_finish_request(). So using it excessively for long running tasks may occupy all your FPM threads up to pm.max_children. This will lead to gateway errors on the webserver.

Another important thing is session handling. Sessions are locked as long as they're active (see the documentation for session_write_close()). This means subsequent requests will block until the session is closed.

You should therefore call session_write_close() as soon as possible (even before fastcgi_finish_request()) to allow subsequent requests and a good user experience.

This also applies for all other locking techniques as flock or database locks for example. As long as a lock is active subsequent requests might bock.
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