Return the page to the client, and do a final IO blocking operation

Question

When generating a page with PHP:

<?php
echo "Hello world";
// generate the HTML output
// HTML finished here
send_output_to_client();       // <-- how to do this?

perform_blocking_IO_operation();      // this can last 100 ms or more, this will not output anything anymore, 
                                      // only internal logging IO operations
?>

how to ask PHP to send the output to the client and don't wait for perform_blocking_IO_operation() to finish?

Since perform_blocking_IO_operation() can last 100 ms or more, I'd like to avoid this unnecessary waiting time for the client.

@Andy I thought `flush` or `ob_flush` would send data to client, but not close the HTTP connection. In my case, I would like to terminate the connection. — Basj, Sep 20 '21 at 16:18
@ADyson Currently I serve the page to client in less than 100 ms; I don't want to double my page generation time because of this. — Basj, Sep 20 '21 at 18:57

score 1 · Accepted Answer · answered Sep 20 '21 at 17:05

1

Use flushing as mentioned above or RabbitMQ.

answered Sep 20 '21 at 17:05

Tannenfels

58
4

3

Thank you and welcome to SO. Please elaborate with sample code and/or reference to documentation for this post to be a complete answer. – Basj Sep 20 '21 at 18:55
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Return the page to the client, and do a final IO blocking operation

1 Answers1