php检查函数

<?php

//安全协议判断

functionssl()

{

    if(isset($_SERVER['HTTPS']) && ('1'== $_SERVER['HTTPS'] || 'on'== strtolower($_SERVER['HTTPS']))) {

        returntrue;

    }elseif(isset($_SERVER['SERVER_PORT']) && ('443'== $_SERVER['SERVER_PORT'])) {

        returntrue;

    }

    returnfalse;

}

// 代理访问检测

functionproxy()

{

    if(!empty($_SERVER['HTTP_X_FORWARDED_FOR']) || !empty($_SERVER['HTTP_VIA']) || !empty($_SERVER['HTTP_PROXY_CONNECTION']) || !empty($_SERVER['HTTP_USER_AGENT_VIA'])) {

        returntrue;

    }

    returnfalse;

}

//机器人检测

functionrobot()

{

    static$_robot = null;

    if(is_null($_robot)) {

        $spiders = 'Bot|Crawl|Spider|slurp|sohu-search|lycos|robozilla';

        $browsers= 'MSIE|Netscape|Opera|Konqueror|Mozilla';

        if(preg_match("/($browsers)/",$_SERVER['HTTP_USER_AGENT'])) {

            $_robot= false;

        }elseif(preg_match("/($spiders)/",$_SERVER['HTTP_USER_AGENT'])) {

            $_robot= true;

        }else{

            $_robot= false;

        }

    }

    return$_robot;

}

 

//浏览器检查

functionbrowser($browser= '')

{

    $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($browsersas $match => $browser_name) {

        if(preg_match('#'. $match. '#i',$_SERVER["HTTP_USER_AGENT"],$matches)) {

            $browser_info[] = $browser_name;

            $browser_info[] = $matches[1];

            $browser_info[] = $browser_name. ' ' . $matches[1];

        }

    }

    return$browser_info;

     

}

 

// 判断Ajax方式提交   

functionajax()

{

    if(isset($_SERVER['HTTP_X_REQUESTED_WITH'])) {

        if('xmlhttprequest'== strtolower($_SERVER['HTTP_X_REQUESTED_WITH']))

            returntrue;

    }

    returnfalse;

}

functionurl($v,$filter=false)

{

    if($filter)$v= filter_var($v, FILTER_SANITIZE_URL);

    if(filter_var($v, FILTER_VALIDATE_URL)) {

        return$v;

    }else{

        returnfalse;

    }

}

functionip($v)

{

    if(filter_var($v, FILTER_VALIDATE_IP)) {

        return$v;

    }else{

        returnfalse;

    }

}

functionemail($v,$filter=false)

{

    if($filter)$v= filter_var($v, FILTER_SANITIZE_EMAIL);

    if(filter_var($v, FILTER_VALIDATE_EMAIL)) {

        return$v;

    }else{

        returnfalse;

    }

}

 

 

 

 

//身份证检查

functioncard($id_card)

{

    include_once('card.php');

    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{

            returnfalse;

        }

    }else{

        returnfalse;

    }

}

 

//银行卡号检查

//位数16-20

functionbank_card($card)

{

   if(!preg_match('#^\d{16,20}$#',$card)) {

        returnfalse;

    }

    $return='';

    $arr= include_once('bank_card.php');

    foreach($arras $k => $v) {

        if(preg_match('#'.$k.'#U',$card)){

            $v=explode('-',$v,3);

            $return['card']=$card;

            $return['name']=$v[0];

            $return['type']=$v[2];

            return$return;

        }

             

    }

    returnfalse;

}

 

//手机号码检查

functionshouji($phone)

{

    if(preg_match('#^1[3458]{1}\d{9}$#',$phone)) {

        return$phone;

    }else{

        returnfalse;

    }

}

 

 

 

//检查字符

functionchar($char,$length='1,6',$charlist='')

{

    if(empty($charlist)) {

        $charlist='A-Za-z0-9_';

    }

    if(preg_match('#^['.$charlist.']{'.$length.'}$#',$char)){

        return$char;

    }else{

        returnfalse;

    }

}

 

 

//检查验证码

functionyzm($yzm)

{

    if(empty($_SESSION['code']) || empty($yzm)) {

        returnfalse;

    }

    if($_SESSION['code'] == substr(md5(strtolower($yzm)), 8, 28)) {

        returntrue;

    }else{

        returnfalse;

    }

}