ngds/common/models/forms/ApproachOrderForm.php

<?php
namespace common\models\forms;

use Codeception\Module\Db;
use common\helpers\Cache;
use common\helpers\Date;
use common\components\Model;
use common\helpers\Form;
use common\helpers\LoggerTool;
use common\helpers\PayStack;
use common\helpers\user\Balance;
use common\helpers\user\Cash;
use common\helpers\user\Info;
use common\libs\logging\operate\AdminOperate;
use common\models\ApproachDecOrder;
use common\models\ApproachOrder;
use common\models\ApproachOrderGoods;
use common\models\BaUser;
use common\models\DealType;
use common\models\DecLevelLog;
use common\models\DecOrder;
use common\models\Order;
use common\models\OrderGoods;
use common\models\Period;
use common\models\ReceiveAddress;
use common\models\Region;
use common\models\ShopGoods;
use common\models\User;
use common\models\UserNetwork;
use common\models\Instalment;
use Yii;
use yii\base\Exception;

/**
 * Login form
 */
class ApproachOrderForm extends Model
{
    public $sn;
    public $expressCompany;
    public $orderTrackNo;
    public $status;
    public $remark;
    public $note;

    public $type;
    public $addressId;
    public $payType;
    public $goodsId;
    public $goodsNum;
    public $payPassword;
    public $email;

    public $userName;
    public $decUserName;
    public $consignee;
    public $acceptMobile;
    public $province;
    public $city;
    public $county;
    public $lgaName;
    public $cityName;
    public $detailaddress;

    private $_address;
    private $_decAmount;
    private $_decPv;
    private $_freight;
    private $_payAmount;
    private $_orderGoods;
    private $_standardAmount;
    private $_decAmountStandard;
    private $_userName;

    /**
     * @var ApproachOrder
     */
    private $_model;

    public function init() {
        parent::init();
        $this->adminOperateLogger = new AdminOperate([
            'fetchClass' => ApproachOrder::class,
        ]);
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['sn', 'expressCompany', 'orderTrackNo', 'status', 'remark','type','addressId','payType','goodsId','goodsNum', 'payPassword','userName','consignee','acceptMobile','province',/*'city','county',*/'lgaName','cityName','detailaddress','email'], 'trim'],
            [['sn', 'expressCompany', 'orderTrackNo', 'status', 'remark','type','addressId','payType','goodsId','goodsNum', 'payPassword','userName','consignee','acceptMobile','province',/*'city','county',*/'detailaddress'/*,'email'*/], 'required'],
            [['status'], 'isStatus'],
            [['addressId'], 'isAddress'],
            [['payType'], 'isPayType'],
            [['payPassword'], 'validatePassword'],
        ];
    }

    public function attributeLabels()
    {
        return [
            'sn' => Yii::t('app', 'orderSn'),
            'expressCompany' => Yii::t('app', 'expressCompany'),
            'orderTrackNo' => Yii::t('app', 'orderTrackNo'),
            'status' => Yii::t('app', 'state'),
            'remark' => Yii::t('app', 'remark'),
            'type' => Yii::t('app', 'orderType'),
            'addressId' => Yii::t('app', 'shippingAddress'),
            'payType' => Yii::t('app', 'payType'),
            'goodsId' => Yii::t('app', 'productID'),
            'goodsNum' => Yii::t('app', 'quantity'),
            'userName' => Yii::t('app', 'repeatSalesMemberNo'),
            'consignee' => Yii::t('app', 'consignee'),
            'acceptMobile' => Yii::t('app', 'acceptMobile'),
            'province' => Yii::t('app', 'province'),
            'city' => Yii::t('app', 'city'),
            'county' => Yii::t('app', 'county'),
            'lgaName' =>Yii::t('app', 'lgaName'),
            'cityName' => Yii::t('app', 'cityName'),
            'detailaddress' => Yii::t('app', 'detailAddress'),
            'email' => Yii::t('app', 'email'),
        ];
    }

    /**
     * 指定校验场景
     * @return array
     */
    public function scenarios()
    {
        $parentScenarios =  parent::scenarios();
        $customScenarios = [
            // 管理员修改订单状态
            'adminStatus' => ['sn', 'status'],
            // 校验订单支付
            'verifyPayStack' => ['sn', 'note', 'status'],
            // 会员下单
            'userOrder' => ['type','addressId', 'payType','goodsId','goodsNum', 'note', 'payPassword'],
        ];
        return array_merge($parentScenarios, $customScenarios);
    }

    /**
     * 校验之前
     * @return bool
     */
    public function beforeValidate()
    {
        $parentValidate = parent::beforeValidate();
        if ($this->sn) {
            $this->_model = ApproachOrder::findOne(['SN' => $this->sn]);
            if (!$this->_model){
                $this->addError('sn', Yii::t('app', 'orderDoesNotExist'));
                return false;
            }
        }

        if ($this->scenario == 'verifyPayStack'){
            if ($this->_model->STATUS != \Yii::$app->params['orderStatus']['notPaid']['value']) {
                $this->addError('sn', Yii::t('app', 'payTypeError'));
                return false;
            }
        }

        return $parentValidate;
    }

    /**
     * 判断收货地址是否存在
     * @param $attribute
     */
    public function isAddress($attribute){
        if (!$receiveAddress = ReceiveAddress::find()->where(' ID=:ID', [':ID' => $this->addressId])->asArray()->one()) {
            $this->addError($attribute, Yii::t('app', 'shippingDoesNotExist'));
        } else {
            $this->_address = $receiveAddress;
        }
    }

    /**
     * 校验支付密码
     * @param $attribute
     * @param $params
     */
    public function validatePassword($attribute, $params) {
        if (!User::validatePayPassword(\Yii::$app->user->id, $this->payPassword)) {
            $this->addError($attribute, Yii::t('app', 'paymentPasswordError'));
        }
    }

    /**
     * 判断支付方式
     * @param $attribute
     */
    public function isPayType($attribute)
    {
        if ($this->payType != 'pay_stack'){
            $this->addError($attribute, Yii::t('app', 'payTypeError'));
            return;
        }

        // 一个订单只能包含一类商品
        $goods = ShopGoods::find()->select('ID,CATEGORY_TYPE')->where(['in', 'ID', $this->goodsId])->andWhere(['STATUS' => 1])->asArray()->all();
        if (!$goods) {
            throw new Exception(Yii::t('app', 'orderCanNotContainMultipleProductCategories'));
            return;
        }
        $goodsCategoryType = array_unique(array_column($goods, 'CATEGORY_TYPE'));
        if (count($goodsCategoryType) > 1) {
            $this->addError($attribute, Yii::t('app', 'orderCanNotHasMoreClassification'));
            return;
        }

        // 购买方式
        $sellTypeLabelMap = array_column(ShopGoods::getSaleType(), NULL, 'label');
        if (!array_key_exists($this->payType, $sellTypeLabelMap)) {
            $this->addError($attribute, Yii::t('app', 'payTypeError'));
            return;
        }

        // 所选支付方式必须是商品分类支持的类型
        $categoryType = array_column(ShopGoods::CATEGORY_TYPE, NULL, 'id');
        // 商品类型
        $currCategoryType = $goodsCategoryType[0];
        if (!array_key_exists($currCategoryType, $categoryType)) {
            $this->addError($attribute, Yii::t('app', 'shopGoodClassificationError'));
            return;
        }

        $sellType = $categoryType[$currCategoryType]['sell_type'] ?? [];
        if (!$sellType || !in_array($this->payType, array_column($sellType, 'label'))) {
            $this->addError($attribute, Yii::t('app', 'payTypeError'));
        }
    }

    /**
     * 校验类型
     * @param $attribute
     */
    public function isStatus($attribute){
        if($this->type && !in_array($this->type, \Yii::$app->params['orderStatus'])){
            $this->addError($attribute, Yii::t('app', 'orderStatusTypeError'));
            return ;
        }
        if ($this->scenario == 'adminStatus'){
            if ($this->status == $this->_model['STATUS']) {
                $this->addError($attribute, Yii::t('app', 'orderStatusDoesNotChange'));
                return ;
            }
            if($this->status == \Yii::$app->params['orderStatus']['notPaid'] && $this->_model['STATUS'] >= \Yii::$app->params['orderStatus']['delivery']) {
                $this->addError($attribute, Yii::t('app', 'orderHasBeenLogisticsStatusDoesNotChangedUnpaid'));
                return ;
            }
            elseif($this->status == \Yii::$app->params['orderStatus']['paid'] && $this->_model['STATUS'] >= \Yii::$app->params['orderStatus']['cancel']) {
                $this->addError($attribute, Yii::t('app', 'orderHasBeenInvalidCanNotProcess'));
                return ;
            }
            elseif($this->status == \Yii::$app->params['orderStatus']['delivery']) {
                $this->addError($attribute, Yii::t('app', 'orderCanNotBeenChangedLogistics'));
                return ;
            }
            elseif($this->status == \Yii::$app->params['orderStatus']['complete'] && $this->_model['STATUS'] > \Yii::$app->params['orderStatus']['cancel']) {
                $this->addError($attribute, Yii::t('app', 'orderHasBeenInvalidCanNotProcess'));
                return ;
            }
            elseif($this->status == \Yii::$app->params['orderStatus']['cancel']) {
                if($this->_model['STATUS'] == \Yii::$app->params['orderStatus']['complete']) {
                    $this->addError($attribute, Yii::t('app', 'orderHasBeenFinishedCanNotCancel'));
                    return ;
                }
                if($this->_model['STATUS'] == \Yii::$app->params['orderStatus']['del']) {
                    $this->addError($attribute, Yii::t('app', 'orderHasBeenDeletedCanNotCancel'));
                    return ;
                }
            }
            elseif($this->status == \Yii::$app->params['orderStatus']['del']) {
                if($this->_model['STATUS'] == \Yii::$app->params['orderStatus']['complete']) {
                    $this->addError($attribute, Yii::t('app', 'orderHasBeenFinishedCanNotDelete'));
                    return ;
                }
            }
        }

    }

    /**
     * 校验PayStack支付,更新订单状态.同步到正式订单.
     * @throws Exception
     */
    public function verifyPayStack(): ?ApproachOrder
    {
        if (!$this->validate()) {
            return null;
        }

        // 调用PayStack支付校验
        LoggerTool::info([$this->note['reference'], $this->note]);
        $payload = PayStack::transactionVerify($this->note['reference']);
        LoggerTool::info($payload);
        if ($payload['status'] !== true) {
            throw new Exception(Form::formatErrorsForApi($payload['message']));
        }
        if ($payload['data']['amount'] != $this->_model->PAY_AMOUNT * 100) {
            throw new Exception(Form::formatErrorsForApi(Yii::t('app', 'payAmountNotEqualOrderAmount')));
        }

        // 订单类型：userOrder(会员订单)、userUpgrade(会员升级)、userDec(会员报单)
        $orderType = $this->note['metadata']['custom_fields'][1]['value'] ?? false;

        $db = \Yii::$app->db;
        $transaction = $db->beginTransaction();
        try {
            // 更新准订单状态为已支付
            $this->_model->STATUS = $this->status;
            $this->_model->NOTE = json_encode($this->note);
            $this->_model->PAY_AT = Date::utcToTime($this->note['paid_at']);
            $this->_model->EMAIL = $this->note['email'];
            if (!$this->_model->save()) {
                throw new Exception(Form::formatErrorsForApi($this->_model->getErrors()));
            }
            // 更新订单商品的支付Email
            ApproachOrderGoods::updateAll(['EMAIL' => $this->note['email']], 'ORDER_SN = :ORDER_SN', [':ORDER_SN' => $this->sn]);

            // 同步准订单到正式订单
            Order::insertOne($this->_model->toArray());
            // 同步准订单商品到正式订单商品
            $approachOrderGoods = ApproachOrderGoods::findAllAsArray('ORDER_SN = :ORDER_SN', [':ORDER_SN' => $this->sn]);
            foreach ($approachOrderGoods as &$approachOrderGood) {
                $approachOrderGood['EMAIL'] = $this->email;
            }
            OrderGoods::batchInsert($approachOrderGoods);

            // 会员报单、BA升级
            if (in_array($orderType, ['userDec', 'baUpgrade', 'userUpgrade'])) {
                // 同步报单
                $approachDecOrder = ApproachDecOrder::findOneAsArray('ORDER_SN = :ORDER_SN', [':ORDER_SN' => $this->sn]);
                if ($approachDecOrder) {
                    unset($approachDecOrder['STATUS']);

                    // 同步报单
                    DecOrder::insertOne($approachDecOrder);

                    // 修改会员锁定状态
                    if (in_array($orderType, ['userDec', 'baUpgrade'])) {
                        if (!User::updateAll(['STATUS' => 1], 'ID=:USER_ID', [':USER_ID' => $approachDecOrder['TO_USER_ID']])) {
                            throw new Exception(Form::formatErrorsForApi(Yii::t('app', 'changeUserStatusError')));
                        }
                    }
                    // 修改BA会员升级状态
//                    if ($orderType === 'baUpgrade') {
//                        // 查询BA会员名
//                        $userInfo = User::findOneAsArray('ID=:USER_ID', [':USER_ID' => $approachDecOrder['TO_USER_ID']]);
//                        if (!BaUser::updateAll(['WHETHER_UPGRADE' => 1, 'BA_UPGRADE_AT' => time()], 'USER_NAME=:USER_NAME', [':USER_NAME' => $userInfo['USER_NAME']])) {
//                            throw new Exception(Form::formatErrorsForApi(Yii::t('app', 'brandAmbassadorUpgradeError')));
//                        }
//                    }

                    // 正式会员-升级单
                    if ($orderType === 'userUpgrade') {
                        // 会员升级 报单类型：2会员升级单
                        if ($approachDecOrder['DETAIL_TYPE'] == 2) {
                            // 为被升级人进行升级操作
                            $decLevelLog = new DecLevelLog();
                            $decLog = [
                                'userId' => $approachDecOrder['TO_USER_ID'],//会员ID
                                'fromId' => $approachDecOrder['ORI_LV'], // 变动前的级别
                                'levelId' => $approachDecOrder['UPGRADE_LV'],// 变动后的级别
                                'actionId' => $approachDecOrder['USER_ID'],
                                'remark' => $approachDecOrder['REMARK'],
                                'lvPv' => $this->_model->PV,
                            ];
                            $modifyDecLv = $decLevelLog->frontendChange($decLog);
                            if (empty($modifyDecLv)) {
                                $transaction->rollBack();
                                throw new Exception(Yii::t('app', 'failedToUpgrade'));
                            }
                        }
                    }

                    // 删除中间表
                    ApproachDecOrder::deleteAll('ORDER_SN = :ORDER_SN', [':ORDER_SN' => $this->sn]);
                }
            }

            // 删除中间表
            ApproachOrder::deleteAll('SN = :SN', [':SN' => $this->sn]);
            ApproachOrderGoods::deleteAll('ORDER_SN = :ORDER_SN', [':ORDER_SN' => $this->sn]);

            $transaction->commit();
        } catch (Exception $e) {
            $transaction->rollBack();
            $this->addError('edit', $e->getFile() . '  ' . $e->getMessage());
            return null;
        }

        return $this->_model;
    }

    /**
     * 复销
     * @throws Exception
     * @throws \yii\db\Exception
     */
    public function add(){
        if(!$this->validate()){
            return null;
        }
        $ids = $this->goodsId;
        $totalAmount = 0;
        $totalPv = 0;
        $totalAmountStandard = 0;
        $goodsType = ShopGoods::getGoodType();
        $hasInstalment = 0;
        $loginUserId = \Yii::$app->user->id;
        $exchangeRate = floatval(Cache::getSystemConfig()['exchangeRate']['VALUE'] ?? 0); // 汇率
        foreach ($this->goodsNum as $k => $v) {
            if ($v) {
                $goods = ShopGoods::findOneAsArray('ID=:ID AND STATUS=1',[':ID'=> $ids[$k]]);
                if (!$goods) {
                    throw new Exception(Yii::t('app', 'productsDoesSoldOut'));
                }
                if($goods['STORE_NUMS']>0){
                    if ($goods['TYPE'] == 1 || $goods['TYPE'] == 2) {
                        $discount = $goodsType[$goods['TYPE']]['discount'];
                        $realPrice = $goods['SELL_PRICE'] * $discount/100;
                        $realPv = $goods['PRICE_PV'] * $discount/100;
                        $realPriceStandard = $goods['SELL_PRICE_STANDARD'] * $discount/100;
                    } else {
                        $discount = $goods['SELL_DISCOUNT'];
                        $realPrice = $goods['SELL_PRICE'] * $discount;
                        $realPv = $goods['PRICE_PV'] * $discount;
                        $realPriceStandard = $goods['SELL_PRICE_STANDARD'] * $discount;
                    }
                    $totalAmount += $realPrice * intval($v);
                    $totalPv += $realPv * intval($v);
                    $totalAmountStandard += $realPriceStandard * intval($v);

                    $this->_orderGoods[] = [
                        'GOODS_ID' => $goods['ID'],
                        'PRICE' => $goods['SELL_PRICE'],
                        'PV' => $goods['PRICE_PV'],
                        'REAL_PRICE' => $realPrice,
                        'REAL_PV' => $realPv,
                        'POINT' => $goods['POINT'],
                        'BUY_NUMS' => intval($v),
                        'TAX_RATE' => $goods['TAX_RATE'],
                        'SKU_CODE' => $goods['GOODS_NO'],
                        'GOODS_TITLE' => $goods['GOODS_NAME'],
                        'CATEGORY_TYPE' => $goods['CATEGORY_TYPE'],
                        'PAY_TYPE' => $this->payType,
                        'EMAIL' => $this->email,
                        'STANDARD_PRICE' => $goods['SELL_PRICE_STANDARD'],
                        'REAL_STANDARD_PRICE' => $realPriceStandard,
                        'EXCHANGE_RATE' => $exchangeRate,
                    ];
                }
                if($goods['INSTALMENT']>0){ // 如果有分期付款商品，检查用户的分期付款状态
                    if($v>1){ // 不可以购买多个
                        throw new Exception(Yii::t('app', 'allowOnlyOne'));
                    }

                    $userStage = Instalment::getStage($loginUserId);
                    // 分期的总期数
                    $instalment = floatval(Cache::getSystemConfig()['instalment']['VALUE'] ?? 3);
                    if ($userStage==0 || $userStage == $instalment){

                    }else{
                        if($userStage + 1 != $goods['INSTALMENT']){ // 若用户分期阶段+1不等于商品的分期阶段，则报异常
                            throw new Exception(Yii::t('app', 'canNotBuy'));
                        }
                    }
                    $hasInstalment = $goods['INSTALMENT'];
                }
            }
        }

        // 运费.奈拉
        $freight = floatval(Cache::getSystemConfig()['freight']['VALUE'] ?? 0);
        // 普通商品免运费阈值.奈拉
        $freeShipping = floatval(Cache::getSystemConfig()['freeShipping']['VALUE'] ?? 0);

        $this->_decAmount = $totalAmount;
        $this->_decPv = $totalPv;
        $this->_freight = ($totalAmount >= $freeShipping) ? 0 : $freight;
        if($this->_address['PROVINCE']==1){
            $this->_freight = 0;
        }
        $this->_payAmount = $this->_decAmount + $this->_freight;
        $this->_decAmountStandard = $totalAmountStandard;
        $this->_standardAmount = $this->_decAmountStandard + $this->_freight;

        $db = \Yii::$app->db;
        $transaction = $db->beginTransaction();
        try {
            //写入订单
            if (!$orderResult = $this->addOrder()) {
                throw new Exception(Form::formatErrorsForApi($orderResult->getErrors()));
            }
            if ($hasInstalment){ // 如果有分期付款的商品，写入信息至分期付款表
                $instalmentModel = Instalment::findOne(['USER_ID'=>$loginUserId]);
                if(!$instalmentModel) {
                    $instalmentModel = new Instalment();
                }
                $instalmentModel->USER_ID = $loginUserId;
                $instalmentModel->STAGE = $hasInstalment;
                $instalmentModel->UPDATE_TIME = time();
                $instalmentModel->save();
            }

            $transaction->commit();

            return $orderResult;
        }catch (\Exception $e){
            $transaction->rollBack();
            $this->addError('add', $e->getMessage());
            return null;
        }
    }

    /**
     * 复销订单
     * @throws Exception
     */
    public function addOrder()
    {
        $periodObj = Period::instance();
        $nowPeriodNum = $periodObj->getNowPeriodNum();
        $nowCalcMonth = $periodObj->getYearMonth($nowPeriodNum);

        $userId = \Yii::$app->user->id;

        $userName = Info::getUserNameByUserId($userId);
        $userRealName = Info::getUserRealNameByUserId($userId);
        $userMobile = Info::getUserMobileByUserId($userId);
        $userEmail = Info::getUserEmailByUserId($userId);
        $exchangeRate = floatval(Cache::getSystemConfig()['exchangeRate']['VALUE'] ?? 0);
        // 加入订单信息
        if ($this->_address['PROVINCE'] != 1) {
            $warehouse = Region::getWarehouseByCode($this->_address['PROVINCE']);//仓库
            if (!$warehouse) {
//                throw new Exception(Yii::t('app', 'deliveryTemporarilyNotSupported'));
            }
        }else{
            $warehouse = '01';
        }
        $_hasPV = $this->_decPv;

        $ordNo = $this->_generateSn();
        $orderModel = new ApproachOrder();
        $orderModel->SN = 'OS' . $ordNo;
        $orderModel->DEC_SN = 'DS' . $ordNo;
        $orderModel->ORDER_TYPE = $this->type;
        $orderModel->USER_ID = $userId;
        $orderModel->USER_NAME = $this->decUserName;
        $orderModel->ORDER_AMOUNT = $this->_decAmount;
        $orderModel->PV = $_hasPV;
        $orderModel->PAY_AMOUNT = $this->_payAmount;
        $orderModel->PAY_PV = $_hasPV; // 兑换积分不能算业绩
        $orderModel->PAY_AT = 0;
        $orderModel->PAY_TYPE = $this->payType;
        $orderModel->PERIOD_NUM = $nowPeriodNum;
        $orderModel->P_CALC_MONTH = Date::ociToDate($nowCalcMonth, Date::OCI_TIME_FORMAT_SHORT_MONTH);
        $orderModel->FREIGHT = $this->_freight;
        $orderModel->PAY_FREIGHT = $this->_freight;
        $orderModel->CONSIGNEE = $this->_address['CONSIGNEE'];
        $orderModel->MOBILE = $this->_address['MOBILE'];
        $orderModel->PROVINCE = $this->_address['PROVINCE'];
//        $orderModel->CITY = $this->_address['CITY'];
//        $orderModel->COUNTY = $this->_address['COUNTY'];
        $orderModel->LGA_NAME = $this->_address['LGA_NAME'];
        $orderModel->CITY_NAME = $this->_address['CITY_NAME'];
        $orderModel->ADDRESS = $this->_address['ADDRESS'];
        $orderModel->FRONT_REMARK = $this->remark;
        $orderModel->WAREHOUSE = $warehouse;
        $orderModel->STATUS = \Yii::$app->params['orderStatus']['notPaid']['value'];
        $orderModel->CREATED_AT = Date::nowTime();
        $orderModel->CREATE_USER = $userName;
        $orderModel->EMAIL = $userEmail?$userEmail:$userName.'@elken.net';
        $orderModel->ORDER_AMOUNT_STANDARD = $this->_decAmountStandard;
        $orderModel->PAY_AMOUNT_STANDARD = $this->_standardAmount;
        $orderModel->EXCHANGE_RATE = $exchangeRate;
        if($this->_address['PROVINCE']==1){
            $orderModel->EXPRESS_TYPE = 1;
            $orderModel->CONSIGNEE = $userRealName;
            $orderModel->MOBILE = $userMobile;
            $orderModel->PROVINCE = 1;
            $orderModel->CITY = 1;
            $orderModel->COUNTY = 1;
            $orderModel->ADDRESS = '';
        }
        if(!$orderModel->save()){
            $this->addErrors($orderModel->getErrors());
            return false;
        }
        // 加入商品到订单商品表
        foreach($this->_orderGoods as $key=>$value) {
            $this->_orderGoods[$key]['ORDER_SN'] = $orderModel->SN;
            $this->_orderGoods[$key]['P_CALC_MONTH'] = Date::ociToDate($nowCalcMonth, Date::OCI_TIME_FORMAT_SHORT_MONTH);
        }
        ApproachOrderGoods::batchInsert($this->_orderGoods);

        // TODO: 记录流水

        return $orderModel;
    }

    /**
     * 生成流水号
     * @return string
     */
    private function _generateSn() {
        return Date::today('Ymd') . $this->_random(10, 1);
    }

    /**
     * 生成随机数
     * @param $length
     * @param int $numeric
     * @return string
     */
    private function _random($length, $numeric = 0) {
        $seed = base_convert(md5(microtime() . $_SERVER['DOCUMENT_ROOT']), 16, $numeric ? 10 : 35);
        $seed = $numeric ? (str_replace('0', '', $seed) . '012340567890') : ($seed . 'zZ' . strtoupper($seed));
        $hash = '';
        $max = strlen($seed) - 1;
        for ($i = 0; $i < $length; $i++) {
            $hash .= $seed[mt_rand(0, $max)];
        }
        return $hash;
    }
}