How Can I Continue PHP Processing After Sending a Response to the Client?

Continuing PHP Processing After Response

When handling requests that require immediate responses, it may be necessary to continue processing PHP after sending the initial response to the client.

Your script receives parameters from a server, generates a response, and needs to prevent the server from considering the message as delivered before it can continue processing. While saving the message in a database and using a cron job could be a solution, it's not ideal for real-time responses.

To solve this issue, you can utilize the following PHP functions:

ignore_user_abort(true); // Not required but recommended
set_time_limit(0); // No time limit

ob_start();
// Handle the request and generate the response
echo $response; // Send the response
header('Connection: close');
header('Content-Length: '.ob_get_length());
ob_end_flush();
@ob_flush();
flush();
fastcgi_finish_request(); // Required for PHP-FPM

// Continue PHP processing after the response has been sent

die(); // **Important** to ensure cleanup if set_time_limit(0) is used

By utilizing these functions, you can send a response to the client, close the connection, and continue executing your PHP script without being interrupted. This allows for immediate responses while still enabling asynchronous processing of the message.

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