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我nl2br对标签使用了函数pre，但我遇到了一个奇怪的问题：有2个换行符，但只有一个<br />标签。

例如：

code in line 1<br />
code in line 2<br />

显示为：

code in line 1

code in line 2

代替：

code in line 1
code in line 2
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4 回答 4

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将文本包装在<pre>标签中将强制它以书面形式显示：包括空格、制表符和换行符。因此，回车将创建一个新行并且<br />将创建第二个新行。

于 2012-06-30T14:53:51.183 回答
0

I had the same problem. The correct answer is much simpler. Don't use nl2br with pre.

nl2br adds <br /> to text for html, but the pre tag already preserves the text format. That's what it means. <pre> = preformatted.

Yes, something like this will work, until it doesn't.

<pre>
    preg_replace ("/[\n\r]+/", "",nl2br(file_get_contents("/crashbody.txt")))
</pre>

But that's silly. You're adding line breaks and removing them. To preserve your whitespace and your line breaks, let <pre> do it's job.

<pre>
    file_get_contents("/crashbody.txt")
</pre>

Or better still:

<div style = "white-space: pre; text-align:left;">
    file_get_contents("/crashbody.txt")
</div>
于 2015-01-04T15:55:28.283 回答
0

当您在 pre 块中编写它时，您不需要应用 nl2br() 。

于 2012-06-30T15:45:03.390 回答
0

preg_replace ("/\n+/", "", $pre)甚至更好preg_replace ("/[\n\r]+/", "", $pre)

于 2012-06-30T14:54:56.593 回答