php缓冲区

<?php
for ($i=0; $i<10; $i++) {
  ob_start();

  echo "This is iteration $i: ";

  // * Don't do this!
  // $buf = ob_get_contents();
  // ob_clean();

  // * Use this instead:
  $buf = ob_get_flush();
  //缓冲区关闭，竟然还有内容

  $test=ob_get_contents();
  echo $test,'---->';
  echo $buf;
  
  echo memory_get_usage()."\n";
  echo '<br />';
}
?> 

 

 ob_get_flush相当于ob_end_flush,只有一点区别，ob_get_flush获取缓存区内容，保存到变量中，并关闭缓存区