php ob_clean 和 ob_flush 的区别？
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Difference between ob_clean and ob_flush?
提问by Alex V
What's the difference between ob_clean()and ob_flush()?
ob_clean()和 和有ob_flush()什么区别？
Also what's the difference between ob_end_clean()and ob_end_flush()? I know ob_get_clean()and ob_get_flush()both get the contents and end output buffering.
还什么之间的区别ob_end_clean()和ob_end_flush()？我知道ob_get_clean()并且ob_get_flush()都得到内容并结束输出缓冲。
回答by Adam Wagner
the *_cleanvariants just empty the buffer, whereas *_flushfunctions print what is in the buffer (send the contents to the output buffer).
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）。
Example:
例子：
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)
回答by Arun Gangula
The key difference is
*_clean()discards changes and *_flush()outputs to the browser.
关键的区别是
*_clean()丢弃更改并*_flush()输出到浏览器。
Usage of ob_end_clean()
的用法 ob_end_clean()
it is mostly used when you want to have a chunk of html and do not want to output to the browser right away but may be used in future.
它主要用于当您想要一大块 html 并且不想立即输出到浏览器但可能在将来使用时。
Eg.
例如。
ob_start()
echo "<some html chunk>";
$htmlIntermediateData = ob_get_contents();
ob_end_clean();
{{some more business logic}}
ob_start();
echo "<some html chunk>";
$someMoreCode = ob_get_content();
ob_end_clean();
renderTogether($htmlIntermediateCode, $someMoreCode);
where as ob_end_flush()will render twice, once for each.
asob_end_flush()将渲染两次，每个渲染一次。
