澳门游戏平台大全 澳门十大电子游戏平台 php过滤XSS攻击的函数_php实例_脚本之家

php过滤XSS攻击的函数_php实例_脚本之家

下面的函数可以用来过滤用户的输入,保证输入是XSS安全的。具体如何过滤,可以参看函数内部,也有注释。复制代码 代码如下: // note that you have to
handle splits with n, r, and t later since they *are*澳门十大电子游戏平台, allowed in
some inputs $val =
preg_replace(‘/([x00-x08,x0b-x0c,x0e-x19])/’, ”, $val);
// straight replacements, the user should never need these since they’re
normal characters // this prevents like
澳门十大电子游戏平台 1 $search =
‘abcdefghijklmnopqrstuvwxyz’; $search .= ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ’;
$search .= ‘1234567890!@#$%^&*()’; $search .=
‘~`”;:?+/={}[]-_|’\’; for ($i = 0; $i < strlen { // ;?
matches the ;, which is optional // 0{0,7} matches any padded zeros,
which are optional and go up to 8 chars // @ @ search for the hex values
$val = preg_replace(‘/([xX]0{0,8}’.dechex.’;?)/i’, $search[$i],
$val); // with a ; // @ @ 0{0,7} matches ‘0’ zero to seven times $val =
preg_replace(‘/({0,8}’.ord/’, $search[$i], $val); // with a ; } //
now the only remaining whitespace attacks are t, n, and r $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; $found = true; // keep replacing as
long as the previous round replaced something while { $val_before =
$val; for ($i = 0; $i < sizeof { $pattern = ‘/’; for ($j = 0; $j <
strlen { if { $pattern .= ‘(‘; $pattern .= ”; $pattern .= ‘|’; $pattern
.= ‘|’; $pattern .= ‘)*’; } $pattern .= $ra[$i][$j]; } $pattern .=
‘/i’; $replacement = substr.”.substr; // add in <> to nerf the
tag $val = preg_replace($pattern, $replacement, $val); // filter out
the hex tags if { // no replacements were made, so exit the loop $found
= false; } } } return $val; } ?>

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