php - output echo'd contents in browser while script is running?

D开发者_开发知识库oes anyone know how to output stuff I echo to a browser while the script is running?

I have a long loop that I'd like to output a string after every run of the loop, kind of like a progress bar, does anyone know how to do that?

Use the ob_flush() function:

ob_start();
//echo stuff...

ob_flush();

//echo more stuff...

ob_flush();