常用的检查函数-PHP源码

1. [文件] fun.php

 "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

3. [文件] bank_card.rar

bank_card.rar

4. [文件] check.php