Are there specific server configurations or settings in the php.ini file that can affect the effectiveness of the flush() function in PHP?

The effectiveness of the flush() function in PHP can be affected by the output_buffering setting in the php.ini file. If output_buffering is set to "On", it can prevent the flush() function from sending data to the client immediately. To ensure that the flush() function works as expected, you can disable output_buffering in the php.ini file.

// Disable output buffering in php.ini file
output_buffering = Off