How Can I Continue PHP Processing After Sending a Response?
Dec 18, 2024 pm 05:24 PM
Continuing PHP Processing after Sending a Response
Your PHP script receives data from a server, processes it, and generates a response. However, you face an issue where the response needs to be sent to the server immediately, but there is additional processing that needs to be done afterwards.
Solution Using Output Buffering and FastCGI
To allow PHP to continue processing after sending a response, you can employ the following solution:
- Enable ignoring of user abort: ignore_user_abort(true); (optional)
- Set an unlimited time limit: set_time_limit(0);
- Use output buffering to send the response prematurely: ob_start();
- Send the response and set appropriate headers: echo $response; followed by header('Connection: close'); and header('Content-Length: '.ob_get_length());;
- Flush the output buffer: ob_end_flush(); @ob_flush(); flush();
- For PHP versions greater than 5.3.3 running on PHP-FPM, finish the request: fastcgi_finish_request();
- Continue with your additional processing.
- End the script: die(); (especially crucial if set_time_limit(0) is used)
This approach will release the connection to the web server while allowing PHP to continue execution and perform the desired post-response processing.
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