极有意思的网站，比较适合我们这些初学者，当然是对PHP有一些基础的初学者
网站主把常用的一些PHP的函数，用Python实现了一遍（或者是显示Python的自有函数），方便我们查找例子
例如：PHP常用的addslashes函数，用来对特殊字符进行转义，
该网站则显示：
http://www.php2python.com/wiki/function.addslashes/
- def addslashes(s):
- d = {'"':'\\"', "'":"\\'", "\0":"\\\0", "\\":"\\\\"}
- return ''.join(d.get(c, c) for c in s)
-
- s = "John 'Johny' Doe (a.k.a. \"Super Joe\")\\\0"
- print s
- print addslashes(s)
-
-
实现方法虽然有点不一样，但对于我们这些初学者已经了解了很多用法，比如for in,join ,dict的get用法。当然还有定义函数的def方法。
这个网站是什么呢？http://www.php2python.com，黑黑，已经加入我的收藏夹了。感谢小缘缘的推荐
XSS攻击在最近很是流行，往往在某段代码里一不小心就会被人放上XSS攻击的代码，看到国外有人写上了函数，咱也偷偷懒，悄悄的贴上来。。。
原文如下：
The goal of this function is to be a generic function that can be used to parse almost any input and render it XSS safe. For more information on actual XSS attacks, check out http://ha.ckers.org/xss.html. Another excellent site is the XSS Database which details each attack and how it works.
PHP代码
- <?php
- function RemoveXSS($val) {
-
-
-
- $val = preg_replace('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/', '', $val);
-
-
-
- $search = 'abcdefghijklmnopqrstuvwxyz';
- $search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
- $search .= '1234567890!@#$%^&*()';
- $search .= '~`";:?+/={}[]-_|\'\\';
- for ($i = 0; $i < strlen($search); $i++) {
- // ;? 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
- $val = preg_replace('/(&#[xX]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val); // with a ;
- // @ @ 0{0,7} matches '0' zero to seven times
- $val = preg_replace('/(�{0,8}'.ord($search[$i]).';?)/', $search[$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');
- $ra = array_merge($ra1, $ra2);
-
- $found = true; // keep replacing as long as the previous round replaced something
- while ($found == true) {
- $val_before = $val;
- for ($i = 0; $i < sizeof($ra); $i++) {
- $pattern = '/';
- for ($j = 0; $j < strlen($ra[$i]); $j++) {
- if ($j > 0) {
- $pattern .= '(';
- $pattern .= '(&#[xX]0{0,8}([9ab]);)';
- $pattern .= '|';
- $pattern .= '|(�{0,8}([9|10|13]);)';
- $pattern .= ')*';
- }
- $pattern .= $ra[$i][$j];
- }
- $pattern .= '/i';
- $replacement = substr($ra[$i], 0, 2).'<x>'.substr($ra[$i], 2);
- $val = preg_replace($pattern, $replacement, $val);
- if ($val_before == $val) {
-
- $found = false;
- }
- }
- }
- return $val;
- }
经过这样的过滤后，应该被攻击的机会会少上很多吧？试试看呢？
