/*----------------------

过滤HTML代码的函数

-----------------------*/

functionhtmlEncode($string){

$string=trim($string);

$string=str_replace("&","&",$string);

$string=str_replace("'","",$string);

$string=str_replace("&","&",$string);

$string=str_replace(""",""",$string);

$string=str_replace(""",""",$string);

$string=str_replace("&lt;","<",$string);

$string=str_replace("<","<",$string);

$string=str_replace("&gt;",">",$string);

$string=str_replace(">",">",$string);

$string=str_replace("&nbsp;","",$string);

$string=nl2br($string);

return$string;

}