function isIdCard($id)
{
    $id        = strtoupper($id);
    $regx      = "/(^\d{15}$)|(^\d{17}([0-9]|X)$)/";
    $arr_split = array();
    if (!preg_match($regx,$id)) {
        return FALSE;
    }
    if (15 == strlen($id)) //检查15位
    {
        $regx = "/^(\d{6})+(\d{2})+(\d{2})+(\d{2})+(\d{3})$/";

        @preg_match($regx,$id,$arr_split);
        //检查生日日期是否正确
        $dtm_birth = "19" . $arr_split[2] . '/' . $arr_split[3] . '/' . $arr_split[4];
        if (!strtotime($dtm_birth)) {
            return FALSE;
        } else {
            return TRUE;
        }
    } else { //检查18位
        $regx = "/^(\d{6})+(\d{4})+(\d{2})+(\d{2})+(\d{3})([0-9]|X)$/";
        @preg_match($regx,$id,$arr_split);
        $dtm_birth = $arr_split[2] . '/' . $arr_split[3] . '/' . $arr_split[4];
        if (!strtotime($dtm_birth)) //检查生日日期是否正确
        {
            return FALSE;
        } else {
            //检验18位身份证的校验码是否正确。
            //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
            $arr_int = array(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2);
            $arr_ch  = array('1','0','X','9','8','7','6','5','4','3','2');
            $sign    = 0;
            for ($i = 0;$i < 17;$i++) {
                /*$b    = (int)$id{
                             $i};*/
                $b    = (string)$id[$i];
                $w    = $arr_int[$i];
                $sign += $b * $w;
            }
            $n       = $sign % 11;
            $val_num = $arr_ch[$n];
            if ($val_num != substr($id,17,1)) {
                return false;
            } else {
                return true;
            }
        }
    }
}

function isAllChineseString($string)
{
    return preg_match('/^\p{Han}+$/u', $string);
}

function isPassword($string)
{
    return preg_match('/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).+$/', $string);
}

function isMobile($mobile)
{
    return preg_match('/^1[345678]\d{9}$/', $mobile); }