ob_clean和ob_flush之间的区别？

Question

ob_clean()和之间有什么区别ob_flush()？

还有什么区别ob_end_clean()和ob_end_flush()？我知道ob_get_clean()并且ob_get_flush()都获得内容和结束输出缓冲.

Answer 1

该*_clean变种刚清空缓冲区,而*_flush功能打印的内容是在缓冲区(发送内容到输出缓冲).

例:

ob_start();
print "foo";      // This never prints because ob_end_clean just empties
ob_end_clean();   //    the buffer and never prints or returns anything.

ob_start();
print "bar";      // This IS printed, but just not right here.
ob_end_flush();   // It's printed here, because ob_end_flush "prints" what's in
                  // the buffer, rather than returning it
                  //     (unlike the ob_get_* functions)