php过滤表单提交的html等危险代码,php过滤表单提交
php过滤表单提交的html等危险代码,php过滤表单提交
PHP过滤提交表单的html代码里可能有被利用引入外部危险内容的代码。例如,有些时候用户提交表单中含有html内容,但这可能造成显示页面布局混乱,需要过滤掉。
方法一:
复制代码 代码如下:
//get post data
function PostGet($str,$post=0)
{
empty($str)?die('para is null'.$str.'!'):'';
if( $post )
{
if( get_magic_quotes_gpc() )
{
return htmlspecialchars(isset($_POST[$str])?$_POST
[$str]:'');
}
else
{
return addslashes(htmlspecialchars(isset($_POST[$str])?
$_POST[$str]:''));
}
}
else
{
if( get_magic_quotes_gpc() )
{
return htmlspecialchars(isset($_GET[$str])?$_GET[$str]:'');
}
else
{
return addslashes(htmlspecialchars(isset($_GET[$str])?
$_GET[$str]:''));
}
}
}
方法二:
复制代码 代码如下:
function uhtml($str)
{
$farr = array(
"/\s+/", //过滤多余空白
//过滤 <script>等可能引入恶意内容或恶意改变显示布局的代码,如果不需要插入flash等,还可以加入<object>的过滤 <br />
"/<(\/?)(script|i?frame|style|html|body|title|link|meta|\?|\%)([^>]*?)>/isU", <br />
"/(<[^>]*)on[a-zA-Z]+\s*=([^>]*>)/isU",//过滤javascript的on事件 <br />
); <br />
$tarr = array( <br />
" ", <br />
"<\1\2\3>",//如果要直接清除不安全的标签,这里可以留空 <br />
"\1\2", <br />
); <br />
$str = preg_replace( $farr,$tarr,$str); <br />
return $str; <br />
} <br />
</script>
很实用的方法吧,希望对大家能有所帮助
你没开启魔法函数, 你可以自己使用函数自动转义就可以了.
使用:addslashes 这个函数来转义一下客户端的数据,例如:
$post = addslashes($_POST['value']);
这个时候显示的就是转义后的文子了!
你的HTML代码有错。
。。。你不用

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