继续下一个id从模型php

你好，我会先发布问题代码，然后再问问题。

function printUserActiveAds($currUser){
        $activeUser = new users();
        $userActiveAds = new userAds();
        echo
        '
            <h4>Currently Active Ads:</h4>
            <table class="userActiveAds">
                <tr><td>Title</td><td></td><td>Price</td><td></td><td>Description</td><td></td><td>Delete</td></tr>
        ';
        $numAds = $userActiveAds->getNumberOfAdsByUserId($currUser);
        if($numAds > 0){
            for($i = 0; $i < $numAds; $i++){
                $id = $userActiveAds->getAdIdByUserId($currUser);
                echo
                '
                    <tr>
                        <td>'.$userActiveAds->getAdTitleById($id).'</td><td></td>
                        <td>'.$userActiveAds->getAdPriceById($id).'</td><td></td>
                        <td>'.truncateDescription($userActiveAds->getAdDescriptionById($id),100).'</td><td></td>
                        <td>
                            <form action="" method="post">
                                <input type="submit" name="delete" id="delete" class="button" value="Delete" />
                            </form>
                        </td>
                    </tr>
                ';
                    }
        }else{
            echo
            '
                <tr><td colspan="7"><span class="prompt">Currently No Active Ads</span></td></tr>
            ';
        }

模型(userAds)

//ad model
    class userAds {
        private $id;
        private $title;
        private $price;
        private $location;
        private $category;
        private $subCategory;
        private $description;
        //default constructor
        function _constructor(){
            $this->id = null;
            $this->title = null;
            $this->price = null;
            $this->location = null;
            $this->category = null;
            $this->subCategory = null;
            $this->description = null;
        }
        //set the ad details
        function setAdDetails($adId,$adTitle, $adPrice, $adLocation, $adCategory, $adSubCategory, $adDescription){
            $this->id = $adId;
            $this->title = $adTitle;
            $this->price = $adPrice;
            $this->location = $adLocation;
            $this->category = $adCategory;
            $this->subCategory = $adSubCategory;
            $this->description = $adDescription;
        }
        //get number of ads by user using user id
        function getNumberOfAdsByUserId($userId){
            $numberOfAds = mysql_query("SELECT * FROM ads WHERE user_id='$userId'") or die(mysql_error());
            return $numAds = mysql_num_rows($numberOfAds);
        }
        //get ad id by user id
        function getAdIdByUserId($userId){
            $queryAdId = mysql_query("SELECT id FROM ads WHERE user_id='$userId'") or die(mysql_error());
            $data = mysql_fetch_assoc($queryAdId);
            return $this->id = $data['id'];
        }

好的，那么问题中的特定代码片段是getAdIdByUserId。它不会遍历与特定用户关联的所有id。基本上，我想要的是将所有与特定用户相关的广告显示在表格中。但是，当我运行上面的代码时，我得到了与该用户关联的广告的正确数量，但表格只显示了与该用户关联的第一个id。我想也许我应该增加id但问题是这个用户有id为1 2 3 7 17的广告。你知道怎么做吗?此外，正如您可以从printacveads函数中看到的那样，我创建了两个对象，我的另一个问题是，我是否必须在函数结束时删除它们，或者我不应该担心它们，因为一旦函数完成(局部作用域)，它们就会被删除。