请问如何在一行文本中去除其中的HTML标记

failsafe

我在手册里面找了一下，好像没有现成的函数。莫非要用正则表达式，可惜对正则表达式不太熟。请指教
我的目的是这样的：
如原文

1. 
   
2. <a href='index.html'>hello world</a>
   

复制代码

处理后变成

1. 
   
2. hello world
   

复制代码

qingmedia

查手册得到的：

strip_tags
(PHP 3>= 3.0.8, PHP 4 , PHP 5)

strip_tags -- Strip HTML and PHP tags from a string
Description
string strip_tags ( string str [, string allowable_tags])


This function tries to return a string with all HTML and PHP tags stripped from a given str. It uses the same tag stripping state machine as the fgetss() function.

You can use the optional second parameter to specify tags which should not be stripped.

注: allowable_tags was added in PHP 3.0.13 and PHP 4.0b3. Since PHP 4.3.0, HTML comments are also stripped.


警告
Because strip_tags() does not actually validate the HTML, partial, or broken tags can result in the removal of more text/data than expected.



例子 1. strip_tags() example

<?php
$text = '
<p>Test paragraph.</p>
<!-- Comment -->
Other text';

echo strip_tags($text);

echo "\n\n-------\n";

// allow <p>
echo strip_tags($text, '<p>');
?>  

The above example will output:

Test paragraph.

Other text

-------

<p>Test paragraph.</p>

Other text





警告
This function does not modify any attributes on the tags that you allow using allowable_tags, including the style and onmouseover attributes that a mischievous user may abuse when posting text that will be shown to other users.


See also htmlspecialchars().