PHP防止被xss和sql语句注入攻击的方法(网站和app通用)详解编程语言

传过来的参数 如果是整数类型 那就直接用intval函数转化为整数 字符串 那就要用函数了 注意输入的内容htmlspecialchars过滤代码如下
// Anti_SQL Injection, escape quotes

function filter($content) {
 if (!get_magic_quotes_gpc()) {
 return addslashes($content);
 } else {
 return $content;
 }
}
 

//过滤参数防止xss攻击 如果返回0 说明被攻击 中断执行
function filterStr($arr,$dec='')
{
 $reivearr = trim($arr);
 if (!isset($arr)) {
 return null;
 }
 $arr = filter(stripSQLChars(stripHTML(trim($arr), true)));
 if ($reivearr != $arr) {
 echo json_encode(array('success' => 0, 'msg' => $dec.'含有非法字符'));
 exit();
 } else {
 return $arr;
 }
}
 
 
function stripHTML($content, $xss = true) {
 $search = array("@<script(.*?)</script>@is",
 "@<iframe(.*?)</iframe>@is",
 "@<style(.*?)</style>@is",
 "@<(.*?)>@is"
 );
 
 $content = preg_replace($search, '', $content);
 
 if($xss){
 $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);
 
 $content = str_ireplace($ra, '', $content);
 }
 
 return strip_tags($content);
}
 
function removeXSS($val) {
 // remove all non-printable characters. CR(0a) and LF(0b) and TAB(9) are allowed
 // this prevents some character re-spacing such as <javaΘscript>
 // note that you have to handle splits with /n, /r, and /t later since they *are* allowed in some inputs
 $val = preg_replace('/([/x00-/x08][/x0b-/x0c][/x0e-/x20])/', '', $val);
 
 // straight replacements, the user should never need these since they're normal characters
 // this prevents like <IMG SRC=&#X40&#X61&#X76&#X61&#X73&#X63&#X72&#X69&#X70&#X74&#X3A&#X61&#X6C&#X65&#X72&#X74&#X28&#X27&#X58&#X53&#X53&#X27&#X29>
 $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
 
 // &#x0040 @ search for the hex values
 $val = preg_replace('/(&#[x|X]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val); // with a ;
 // @ @ 0{0,7} matches '0' zero to seven times
 $val = preg_replace('/(&#0{0,8}'.ord($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 .= '(&#[x|X]0{0,8}([9][a][b]);?)?';
 $pattern .= '|(&#0{0,8}([9][10][13]);?)?';
 $pattern .= ')?';
 }
 $pattern .= $ra[$i][$j];
 }
 $pattern .= '/i';
 $replacement = substr($ra[$i], 0, 2).'<x>'.substr($ra[$i], 2); // add in <> to nerf the tag
 $val = preg_replace($pattern, $replacement, $val); // filter out the hex tags
 if ($val_before == $val) {
 // no replacements were made, so exit the loop
 $found = false;
 }
 }
 }
 
 return $val;
}
 
/**
 * Strip specail SQL chars
 */
function stripSQLChars($str) {
 $replace = array('SELECT', 'INSERT', 'DELETE', 'UPDATE', 'CREATE', 'DROP', 'VERSION', 'DATABASES',
 'TRUNCATE', 'HEX', 'UNHEX', 'CAST', 'DECLARE', 'EXEC', 'SHOW', 'CONCAT', 'TABLES', 'CHAR', 'FILE',
 'SCHEMA', 'DESCRIBE', 'UNION', 'JOIN', 'ALTER', 'RENAME', 'LOAD', 'FROM', 'SOURCE', 'INTO', 'LIKE', 'PING', 'PASSWD');
 
 return str_ireplace($replace, '', $str);
}