常用的检查函数

1. [文件]     fun.php 

<?php
//安全协议判断
function ssl()
{
    if (isset($_SERVER[&#39;HTTPS&#39;]) && (&#39;1&#39; == $_SERVER[&#39;HTTPS&#39;] || &#39;on&#39; == strtolower($_SERVER[&#39;HTTPS&#39;]))) {
        return true;
    } elseif (isset($_SERVER[&#39;SERVER_PORT&#39;]) && (&#39;443&#39; == $_SERVER[&#39;SERVER_PORT&#39;])) {
        return true;
    }
    return false;
}
// 代理访问检测
function proxy()
{
    if (!empty($_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;]) || !empty($_SERVER[&#39;HTTP_VIA&#39;]) || !empty($_SERVER[&#39;HTTP_PROXY_CONNECTION&#39;]) || !empty($_SERVER[&#39;HTTP_USER_AGENT_VIA&#39;])) {
        return true;
    }
    return false;
}
//机器人检测
function robot()
{
    static $_robot = null;
    if (is_null($_robot)) {
        $spiders  = &#39;Bot|Crawl|Spider|slurp|sohu-search|lycos|robozilla&#39;;
        $browsers = &#39;MSIE|Netscape|Opera|Konqueror|Mozilla&#39;;
        if (preg_match("/($browsers)/", $_SERVER[&#39;HTTP_USER_AGENT&#39;])) {
            $_robot = false;
        } elseif (preg_match("/($spiders)/", $_SERVER[&#39;HTTP_USER_AGENT&#39;])) {
            $_robot = true;
        } else {
            $_robot = false;
        }
    }
    return $_robot;
}

//浏览器检查
function browser($browser = &#39;&#39;)
{
    $browsers = array(
        ".*opera[ /]([0-9.]{1,10})" => "opera",
        ".compatible; MSIE[ /]([0-9.]{1,10}).*" => "ie",
        ".*Firefox/([0-9.+]{1,10})" => "firefox",
        ".Version/([0-9.+]{1,10})" => "safari",
        ".Chrome/([0-9.+]{1,10})" => "chrome"
    );

    $browser_info = array();
    foreach ($browsers as $match => $browser_name) {
        if (preg_match(&#39;#&#39; . $match . &#39;#i&#39;, $_SERVER["HTTP_USER_AGENT"], $matches)) {
            $browser_info[] = $browser_name;
            $browser_info[] = $matches[1];
            $browser_info[] = $browser_name . &#39; &#39; . $matches[1];
        }
    }
	return $browser_info;
    
}

// 判断Ajax方式提交    
function ajax()
{
    if (isset($_SERVER[&#39;HTTP_X_REQUESTED_WITH&#39;])) {
        if (&#39;xmlhttprequest&#39; == strtolower($_SERVER[&#39;HTTP_X_REQUESTED_WITH&#39;]))
            return true;
    }
    return false;
}
function url($v,$filter=false)
{
    if($filter) $v = filter_var($v, FILTER_SANITIZE_URL);
    if (filter_var($v, FILTER_VALIDATE_URL)) {
        return $v;
    } else {
        return false;
    }
}
function ip($v)
{
    if (filter_var($v, FILTER_VALIDATE_IP)) {
        return $v;
    } else {
        return false;
    }
}
function email($v,$filter=false)
{
    if($filter) $v = filter_var($v, FILTER_SANITIZE_EMAIL);
    if (filter_var($v, FILTER_VALIDATE_EMAIL)) {
        return $v;
    } else {
        return false;
    }
}




//身份证检查
function card($id_card)
{
    include_once(&#39;card.php&#39;);
    if (strlen($id_card) == 18 && idcard_checksum18($id_card)) {
        return $id_card;
    } elseif (strlen($id_card) == 15) {
        $id_card2 = idcard_15to18($id_card);
        if (idcard_checksum18($id_card2)) {
            return $id_card;
        } else {
            return false;
        }
    } else {
        return false;
    }
}

//银行卡号检查
//位数16-20
function bank_card($card)
{
   if (!preg_match(&#39;#^\d{16,20}$#&#39;, $card)) {
        return false;
    } 
	$return=&#39;&#39;;
    $arr = include_once(&#39;bank_card.php&#39;);
    foreach ($arr as $k => $v) {
        if (preg_match(&#39;#&#39;.$k.&#39;#U&#39;,$card)){
			$v=explode(&#39;-&#39;,$v,3);
			$return[&#39;card&#39;]=$card;
			$return[&#39;name&#39;]=$v[0];
			$return[&#39;type&#39;]=$v[2];
			return $return;
		}
            
    }
    return false;
}

//手机号码检查
function shouji($phone)
{
    if (preg_match(&#39;#^1[3458]{1}\d{9}$#&#39;, $phone)) {
        return $phone;
    } else {
        return false;
    }
}



//检查字符
function char($char,$length=&#39;1,6&#39;,$charlist=&#39;&#39;)
{
    if (empty($charlist)) {
        $charlist=&#39;A-Za-z0-9_&#39;;
    }
	if(preg_match(&#39;#^[&#39;.$charlist.&#39;]{&#39;.$length.&#39;}$#&#39;,$char)){
		return $char;
	}else{
		return false;
	}
}


//检查验证码
function yzm($yzm)
{
    if (empty($_SESSION[&#39;code&#39;]) || empty($yzm)) {
        return false;
    }
    if ($_SESSION[&#39;code&#39;] == substr(md5(strtolower($yzm)), 8, 28)) {
        return true;
    } else {
        return false;
    }
}

                               

2. [文件]     card.php 

<?php
// 计算身份证校验码，根据国家标准GB 11643-1999 
function idcard_verify_number($idcard_base)
{
    if (strlen($idcard_base) != 17) {
        return false;
    }
    //加权因子 
    $factor             = array(
        7,
        9,
        10,
        5,
        8,
        4,
        2,
        1,
        6,
        3,
        7,
        9,
        10,
        5,
        8,
        4,
        2
    );
    //校验码对应值 
    $verify_number_list = array(
        &#39;1&#39;,
        &#39;0&#39;,
        &#39;X&#39;,
        &#39;9&#39;,
        &#39;8&#39;,
        &#39;7&#39;,
        &#39;6&#39;,
        &#39;5&#39;,
        &#39;4&#39;,
        &#39;3&#39;,
        &#39;2&#39;
    );
    $checksum           = 0;
    for ($i = 0; $i < strlen($idcard_base); $i++) {
        $checksum += substr($idcard_base, $i, 1) * $factor[$i];
    }
    $mod           = $checksum % 11;
    $verify_number = $verify_number_list[$mod];
    return $verify_number;
}
// 将15位身份证升级到18位 
function idcard_15to18($idcard)
{
    if (strlen($idcard) != 15) {
        return false;
    } else {
        // 如果身份证顺序码是996 997 998 999，这些是为百岁以上老人的特殊编码 
        if (array_search(substr($idcard, 12, 3), array(
            &#39;996&#39;,
            &#39;997&#39;,
            &#39;998&#39;,
            &#39;999&#39;
        )) !== false) {
            $idcard = substr($idcard, 0, 6) . &#39;18&#39; . substr($idcard, 6, 9);
        } else {
            $idcard = substr($idcard, 0, 6) . &#39;19&#39; . substr($idcard, 6, 9);
        }
    }
    $idcard = $idcard . idcard_verify_number($idcard);
    return $idcard;
}
// 18位身份证校验码有效性检查 
function idcard_checksum18($idcard)
{
    if (strlen($idcard) != 18) {
        return false;
    }
    $idcard_base = substr($idcard, 0, 17);
    if (idcard_verify_number($idcard_base) != strtoupper(substr($idcard, 17, 1))) {
        return false;
    } else {
        return true;
    }
}
?>

3. [文件]     bank_card.rar 

bank_card.rar

                               

4. [文件]     check.php 

<?php
require_once(&#39;../lib/check/fun.php&#39;);
//安全协议判断
var_dump(ssl());
// 代理访问检测
var_dump(proxy());
//机器人检测
var_dump(robot());
//浏览器检查
var_dump(browser(&#39;chrome&#39;));
// 判断Ajax方式提交    
var_dump(ajax());
//url 
//参数url，是否预先过滤url非法字符
var_dump(url(&#39;http://127.0.0.1/lizhi/check.php&#39;,true));
//ip 
//参数 待检ip
var_dump(ip(&#39;11.444.55.66&#39;));
//email
//参数email，是否预先过滤email非法字符
var_dump(email(&#39;24556@qq.com&#39;,true));
//身份证检查
var_dump(card(&#39;350128198506275555&#39;));
//银行卡号检查
//位数16-20
var_dump(bank_card(&#39;6258081480887777&#39;));
//手机号码检查
var_dump(shouji(&#39;13052561263&#39;));

//检查字符串
//参数 待检字符串 匹配长度 匹配字符集
var_dump(char(&#39;ee1301263&#39;,&#39;1,20&#39;));
//检查验证码
yzm(&#39;sss&#39;);