Issue with ob handler context and execution in PHP

Description

I am encountering an issue while working with the "ob_start" function in PHP and the callback parameter.

Description:
When utilizing ob_start("system") to initiate output buffering with the "system" callback in the provided code snippet, I've observed that the zend_get_executed_filename function fails to return the correct file name when the "system" zend function is executed.

This discrepancy occurs particularly when a flush operation happens during php_request_shutdown.

<?php
ob_start("system");
?>

Observations:
Upon debugging, I've noticed the following:

• Omission of the ob_flush() function call results in the flushing of output handlers during php_request_shutdown.
• Prior to the invocation of php_output_end_all, the EG(current_execute_data) variable is set to NULL.
• Consequently, when the "system" function is executed, it operates without the context of the current executed file name, leading to unexpected behavior.

Expected Behavior:
I expect the zend_get_executed_filename function to accurately retrieve the file name, even in scenarios involving flush operations during php_request_shutdown. Is this feasible?

PHP Version

PHP 8.3.3

Operating System

No response

Start by tracing php_request_shutdown through php_output_end_all when ob_start("system") is used, and inspect how EG(current_execute_data) is handled before system calls zend_get_executed_filename. Reproduce the PHP 8.3.3 example with and without ob_flush(); done means the executed filename remains correct during shutdown flushing.