Difference between ob_get_clean and ob_get_flush

Question

They both seem to do the same thing: return the output buffer content to you and delete it aftewards.

Which one should I use?

Answer 1

Both functions clear the output buffer, turn off output buffering, and return the previous buffer value.

However, ob_get_flush first sends the current buffer to the client, whereas ob_get_clean just discards it.