转换< br />到\ n再回来（Textarea） [英] Converting <br/> to \n and Back Again (Textarea)
问题描述
我正在开发一个网站，我的客户端将能够使用输入框维护网站上的一些文本，并由PHP和MySQL驱动。我遇到的问题是让他们很容易将文本输入到textarea并让它自动格式化< br />返回笔划的标签（textarea中的\ n）。我知道如何将\ n'转换为"< br />"当使用str_replace将新项目添加到数据库中时。但是，当他们稍后去编辑该字段时，我需要它将< br />返回到\ n'（在textarea中），以便返回原始格式他们输入并且他们不必担心任何代码。
nl2br（）
或者简单地
str_replace（）
不那么简单。 < b取代;标签可以有3种不同的格式，因此您必须应对所有这些格式。您可以使用正则表达式，但以下内容将使其更清晰：
[php]
new_string = str_replace（array（" < br>"，"< br />"，"< br />"），array（" \ n"，" \ n"，" \ N'QUOT），
I''m working on a site where my client will be able to maintain some of the text on the site using input boxes and such driven by PHP and MySQL. The problem I am running into is making it easy for them to enter text into a textarea and have it automatically format the "<br/>" tags from their return strokes ("\n" in the textarea). I know how to convert the \n''s to "<br/>" when a new item is added into the database using "str_replace". However, when they go to edit that field later on, I need it to convert the "<br/>"''s back to \n''s (in a textarea) so it returns the original formatting they typed in and they don''t have to worry about any code.
nl2br()
or, simply
str_replace()
Not that simple. <b> tags can have 3 different formats, so you have to cope with all of them. You could use a regular expression, but the following will make it more clear:
[php]
new_string=str_replace(array("<br>","<br/>","<br />"), array("\n","\n","\n"),
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