PHP输出缓冲不起作用！

Question

ob_start();

for($i=1; $i<=10; $i++){
  echo 'FUU';
  $output = ob_get_contents();
}

echo $output;
ob_end_flush();  

So instead of one FUU I get 10! Why does my ob_start() not work?

Answer 1

I don't think you get what it's doing. Here's a walk through:

$i = 1
Output buffer = FUU
ob_get_contents()/$output = FUU

$i = 2
Output buffer = FUUFUU
ob_get_contents()/$output = FUUFUU

$i = 3
Output buffer = FUUFUUFUU
ob_get_contents()/$output = FUUFUUFUU

When you call ob_get_contents each iteration, it's getting everything that has been echoed.