如何在文本区域中允许粗体，下划线和斜体

从数据库读取文本时，我当前正在使用 nl2br().不幸的是，如果我用来包裹一些文本，或者该文本没有加粗，并且仍显示代码.如何允许某些HTML通过并正确呈现?

I'm currently using nl2br() when reading text from a database. Unfortunately, if I wrap some text within with or the text doesn't bold it and shows the code still. How do I allow for some html to go through and be rendered correctly?

我目前正在从数据库中获取此信息...

I'm currently getting this outputted from the database...

< b> blah blah text</b>

当我希望它以粗体显示而不是仍然存在的标记时.

when I'd like it to show bold instead of the tags still existing.

例如:

在数据库中，我有一个虚拟帖子来测试数据库是否正常工作.

In the database I have a dummy post to test if the database works.

数据库读取...

Hello and welcome to the forums! 

<b>Test</b>

该信息正通过nl2br()读回.

That information is being read back through nl2br() as..

Hello and welcome to the forums! 

<b>Test</b>

我希望测试加粗.