blocks|key|5300880|text|您可以使用flush()强制将缓冲区内容发送到浏览器。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5300881|您可以使用"ob_implicit_flush(true)“启用隐式刷新。|5300882|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/flush|1|http://php.net/ob_implicit_flush^0|5|7|5|7|0|0|6|N|6|N|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]]|E|$]]|$1|F|3|G|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@$9|10|A|11|1|12]]|E|$]]|$1|H|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]|P|$5|K|L|M|E|$N|Q]]]]

You can use <a href="http://php.net/flush" rel="noreferrer"><code>flush()</code></a> to force sending the buffer contents to the browser.

You can enable implicit flushing with "<a href="http://php.net/ob_implicit_flush" rel="noreferrer"><code>ob_implicit_flush(true)</code></a>".

blocks|key|778556|text|function+printnow($str,+$bbreak=true){
++++print+"$str";
++++if($bbreak){
++++++++print+"<br+/>";
++++}
++++ob_flush();+flush();
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|778557|显然，如果你向它传递复杂的对象(或者至少那些没有实现__toString的对象)，这将不会表现出来，但是，你明白了。|unstyled|778558|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>function printnow($str, $bbreak=true){
 print "$str";
 if($bbreak){
 print "&lt;br /&gt;";
 }
 ob_flush(); flush();
}
</code></pre>

Obviously this isn't going to behave if you pass it complicated objects (or at least those that don't implement __toString) but, you get the idea.

blocks|key|5301027|text|正如其他人指出的，除了PHP之外，还有一些地方可能会挂起(例如，web服务器或客户端的浏览器)。如果您确实希望确保信息在可用时显示，那么您可能需要一些基于AJAX的解决方案。您将有一个处理显示的PHP脚本和另一个处理计算的PHP脚本，并让display脚本向另一个脚本发出AJAX请求。jQuery有一些非常简单的AJAX函数，可能会在这方面对您有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5301028|如果浏览器不支持/禁用了JavaScript，您还需要有一个后备，因为它只是一个标准页面，直到页面结束时才会显示内容。|5301029|entityMap|0|LINK|mutability|MUTABLE|url|http://jquery.com/^0|3Z|6|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

As others pointed out, there are places where things can get hung up besides PHP (e.g., the web server or the client's browser). If you really want to ensure that information is displayed as it becomes available, you'll probably need some AJAX-based solution. You would have one PHP script that handles display and another that does calculations, and have the display script make AJAX requests to the other. <a href="http://jquery.com/" rel="nofollow noreferrer">jQuery</a> has some pretty simple AJAX functions that might help you there.

You'd also want to have a fallback in case the browser doesn't support/has disabled JavaScript that would just be the standard page that may not display content until the end.

blocks|key|3890001|text|您可以在PHP中调用flush()，但还可以将输出保存在其他几个位置(例如，在You服务器上)。如果您正在使用输出缓冲，则还需要调用ob_flush()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3890002|您可能还会发现，一些浏览器在HTML有效之前不会呈现页面，而html在关闭所有标记(如body、html)之后才会生效。|3890003|entityMap^0|4|3|A|7|1U|A|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@$9|L|A|M|B|C]|$9|N|A|O|B|D]|$9|P|A|Q|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|R|8|@]|E|@]|F|$]]|$1|I|3|-4|5|6|7|S|8|@]|E|@]|F|$]]]|J|$]]

You can call <code>flush()</code> in PHP, but there are several other places that the output may be held (e.g. on the webserver). If you are using output buffering you need to call <code>ob_flush()</code> also.

You may also find that some browsers will not render the page until the HTML is valid which won't be until all the tags are closed (like body, html)

blocks|key|778649|text|正如蓝眼所说的那样，启用隐式刷新应该可以做到这一点，因为它在每次回显之后都会调用flush，然而，一些浏览器还需要设置无缓存头。下面是我使用的代码。您的里程数可能因浏览器而异。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|778650|header('Cache-Control:+no-cache,+no-store,+max-age=0,+must-revalidate');
header('Expires:+Mon,+26+Jul+1997+05:00:00+GMT');+//+Date+in+the+past
header('Pragma:+no-cache');|code-block|syntax|javascript|778651|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Enabling implicit flush as blueyed said should do the trick since it calls flush after every echo however some browsers also require no-cache headers to be set. Here is what I use. Your mileage may vary depending on the browser.

<pre><code>header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Pragma: no-cache');
</code></pre>

blocks|key|775685|text|从这里开始你的调查：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|775686|http://httpd.apache.org/docs/1.3/misc/FAQ-F.html#nph-scripts|offset|length|775687|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1O|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Start your investigation here:

<a href="http://httpd.apache.org/docs/1.3/misc/FAQ-F.html#nph-scripts" rel="nofollow noreferrer">http://httpd.apache.org/docs/1.3/misc/FAQ-F.html#nph-scripts</a>

blocks|key|5300987|text|flush()是答案的一部分。然而，至少在一年前，在Safari中使用flush是不可靠的。根据您的场景，我将研究涉及javascript的解决方案。也许进度条的各种实现都有你可以重复使用的代码/想法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5300988|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

flush() is part of the answer. At least until a year ago, using flush was unreliable in Safari, however. Depending on your scenario, I'd look into solutions involving javascript. Maybe the various implementation of progress bars have code/ideas you can recycle.

blocks|key|5301048|text|我建议使用AJAX。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5301049|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For example, if I have an echo statement, there's no guarantee that the browser might display it right away, might display a few dozen echo statements at once, and might wait until the entire page is done before displaying anything.

Is there a way to have each echo appear in a browser as it is executed?

Is there a way to have PHP print the data to a web browser in real time?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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例如，如果我有一个echo语句，不能保证浏览器可能会立即显示它，可能会一次显示几十个echo语句，可能要等到整个页面完成后才会显示任何内容。有没有一种方法可以让每个echo在执行时出现在浏览器中？

问有没有办法让PHP将数据实时打印到web浏览器上？
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问有没有办法让PHP将数据实时打印到web浏览器上？
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