帮忙看一下

replace(replace(replace(replace(str,"<","<"),">",">"),chr(13),"

1<br/>

")," "," ")
这段代码有什么作用呢?
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字符转义
把str里的<换成<
>换成>
chr(13)换成回车

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是用来屏蔽<,>,回车和空格的
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调整显示格式
禁用HTML语法

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