php 正则身份证

 if (!preg_match('/^[\x7f-\xff]+$/', $name)){
            return resFailMsg('Incorrect name format');
        }
        if(!self::isIdcard($id)){
            return resFailMsg('Incorrect id card format"');
        }
        return resSuccessMsg();
    }
    /**
     * 验证身份证号码
     */
    public  static  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];
                    $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;
                }
            }
        }

    }
}