PHP多继承的简单写法

PHP多继承的简单写法
采用的是interface 然而继承没用extend

<?php 
interface father{ 
function shuchu(); 
} 
interface mother{ 
function dayin($my); 
} 
interface fam extends father,mother{ 
function cook($name); 
} 
class test implements fam{ 
function dayin($my){ 
echo "我的名字是:".$my;  
echo "<br>"; 
} 
function shuchu(){ 
echo "接口继承,要实现两个抽象方法"; 
echo "<br>"; 
} 
function cook($name){ 
echo "平时经常做饭的人是:".$name;  
} 
} 
$t=new test(); 
$t->shuchu(); 
$t->dayin("小强");  
$t->cook("妈妈");  
?> 

PHP防止被xss和sql语句注入攻击的方法(网站和app通用)

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);
}

PHP接口签名验证写法(app)

一般app传过来 多传个sign字段 这个sign字段是根据前面传的参数生成的 PHP验证也是按照参数生成sign来验证 是不是签名验证正确 ps:注意 同时也要注意每次传参数相同的时候 sign不改验证也是正确的 所以适当的时候sign可以存起来判断有没有这个sign

//这个是验证签名的写法
      //判断sign是否相等
    const API_KEY='my_key';
    public static function verify($parameters)
    {
        //如果sign不一致 签名失败

        if ($parameters['sign'] != self::str_encrypt($parameters)) {
            return 0;
        } else {
            return 1;
        }
    }


    //新版加密
    public static function str_encrypt($parameters)
    {
        unset($parameters['time']);
        unset($parameters['sign']);
        $parameters['key']=self::API_KEY;
        ksort($parameters);
        $signPars = self::url_build($parameters);
        $signPars=trim($signPars,'&');

        return strtolower(md5($signPars));
    }

    //新版字符串拼接
    public static function url_build($parameters)
    {
        $signPars = '';
        foreach ($parameters as $k => $v) {
            if (isset($v)) {
                $signPars .= $k . '=' . $v . '&';
            }
        }
        return $signPars;
    }


签名验证还有个好处就是防止刷接口(动态参数 比方说破解密码(因为要不断的换密码)