[PHP知识库]PHP验证身份证、获取身份证信息

/**
 * 验证身份证
 * @param $id_card
 * @return bool
 */
function check_id_card($id_card){
    if(strlen($id_card) != 18){
        return false;
    }
    $id_card_base = substr($id_card,0,17);
    if(id_card_verify_number($id_card_base) != strtoupper(substr($id_card,17,1))){
        return false;
    }else{
        return true;
    }
}

/**
 * 计算身份证校验码，根据国家标准GB 11643-1999
 * @param $id_card_base
 * @return bool|mixed
 */
function id_card_verify_number($id_card_base){
    if(strlen($id_card_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('1','0','X','9','8','7','6','5','4','3','2');
    $checksum = 0;
    for($i=0;$i<strlen($id_card_base);$i++){
        $checksum += substr($id_card_base,$i,1) * $factor[$i];
    }
    $mod = $checksum % 11;
    $verify_number = $verify_number_list[$mod];
    return $verify_number;
}


/**
 * 根据身份证号码获取性别
 * @param $id_card
 * @return string|null
 */
function get_sex($id_card) {
    if(empty($id_card)) return null;
    $sexInt = substr($id_card, 16, 1);
    return $sexInt % 2 === 0 ? '女' : '男';
}

/**
 * 获取出生年月
 * @param string $id_card 操作数据
 * @return mixed
 */
function get_birthday($id_card){
    $year = substr($id_card, 6, 4);
    $month = substr($id_card, 10, 2);
    $day = substr($id_card, 12, 2);
    return $year.'-'.$month.'-'.$day;
}
/**
 * 获取周岁
 * @param string $id_card 操作数据
 * @return mixed
 */
function get_age($id_card){
    $now_year = date('Y');
    $now_month = date('m');
    $now_day = date('d');
    $year = substr($id_card, 6, 4);
    $month = substr($id_card, 10, 2);
    $day = substr($id_card, 12, 2);
    $age = $now_year - $year - 1;
    if ($month < $now_month || ($month == $now_month && $day <= $now_day)){
        $age++;
    }
    return $age;
}