A small example of php output buffering

//开启缓冲
ob_start();
// Output stuff (probably not this simple, might be custom CMS functions...
echo 'Print to the screen!!!';
// Get value of buffering so far
$getContent = ob_get_contents();
// Stop buffering
ob_end_clean();
// Do stuff to $getContent as needed
// Use it
echo 'Now: ' . $getContent;
?>