PHP Ob_flush and Flush

PHP Ob_flush and Flush

In php.ini
output_buffering = off off PHP cache
Implicit_flush = Off php will not be output to the browser immediately. If on, the equivalent of each echo immediately executes a flush

The output_buffering is equivalent to a cushion. There is also a layer of buffering between PHP and the browser. The Ob_flush function is equivalent to writing PHP buffers to PHP, such as the browser output layer that buffer, of course, if Output_buffering=off, that is, the equivalent of no PHP buffer, directly written to PHP and browser buffer. The flush function is to buffer the PHP output layer immediately to the browser, output on the browser.

Output_buffering=off is equivalent to performing a ob_flush for each echo.

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