废话不多说，直接上代码：

/** 
 * @todo  暂时写这的
* @去除XSS（跨站脚本攻击）的函数 
* @par $val 字符串参数，可能包含恶意的脚本代码如<script language="javascript">// <![CDATA[
alert("hello world");
// ]]></script>* @return 处理后的字符串 * @Recoded By thinkphp **/ public function RemoveXSS($val) { $val = preg_replace('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/', '', $val); $search = 'abcdefghijklmnopqrstuvwxyz'; $search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; $search .= '1234567890!@#$%^&amp;*()'; $search .= '~`";:?+/={}[]-_|\'\\'; for ($i = 0; $i &lt; strlen($search); $i++) { $val = preg_replace('/(&amp;#[xX]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val); // with a ; $val = preg_replace('/(&amp;#0{0,8}'.ord($search[$i]).';?)/', $search[$i], $val); // with a ; } $ra1 = Array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'style', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base'); $ra2 = Array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur','onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload'); $ra = array_merge($ra1, $ra2); $found = true; while ($found == true) { $val_before = $val; for ($i = 0; $i &lt; sizeof($ra); $i++) { $pattern = '/'; for ($j = 0; $j &lt; strlen($ra[$i]); $j++) { if ($j &gt; 0) { $pattern .= '('; $pattern .= '(&amp;#[xX]0{0,8}([9ab]);)'; $pattern .= '|'; $pattern .= '|(&amp;#0{0,8}([9|10|13]);)'; $pattern .= ')*'; } $pattern .= $ra[$i][$j]; } $pattern .= '/i'; $replacement = substr($ra[$i], 0, 2).''.substr($ra[$i], 2); $val = preg_replace($pattern, $replacement, $val); if ($val_before == $val) { $found = false; } } } return $val; }

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