How Can I Keep PHP Execution Running After Sending an HTTP Response?

Continuing PHP Execution After HTTP Response with mod_php

To overcome the issue of PHP execution being terminated by a calling application due to a timeout before the script can complete essential operations, one can leverage specific techniques within the PHP script itself.

The Response-Abort-Resume Method

The provided code snippet utilizes the following approach:

1. Clear the output buffer and set the "Connection: close" header to terminate the HTTP response.
2. Enable "ignore_user_abort" to prevent PHP execution from being interrupted by the client.
3. Start a new output buffer.
4. Echo the desired message to the browser.
5. Obtain the size of the output buffer and add a "Content-Length" header to inform the browser of the response size.
6. Flush both output buffers to send the response to the client.
7. Close the session to release resources held by PHP.
8. Perform additional processing and operations within the modified script.

Implementation Details

It's essential to note that the "ob_end_flush()" and "flush()" functions both need to be called in sequence for the response to be transmitted to the client. Additionally, some users have reported improved results by adding "session_write_close()" to close PHP's session management resources.

By implementing this method, PHP scripts can quickly dispatch an HTTP response to a waiting application and continue executing important operations without facing premature termination issues.

The above is the detailed content of How Can I Keep PHP Execution Running After Sending an HTTP Response?. For more information, please follow other related articles on the PHP Chinese website!