PHP 搜索表单不返回所有结果

Question

我有一个汽车经销商网站。该网站从 Access 数据库 (.mdb) 中提取车辆信息。我无法更改这一点，因为集成来自他们当前的 DMS，它将数据保存到 .mdb。

在这个网站上，我有一个搜索表单来查询特定车辆的数据库。表单有效，查询也有效。

但是，问题来了；比如说数据库中有 5 辆福特汽车，用户搜索所有可用的福特汽车，查询只返回可用 5 辆中的 4 辆。

请看下面我的代码。

        $conn = odbc_connect("Driver={Microsoft Access Driver (*.mdb)};Dbq=$dbName", '', '');

        $searchMake = addslashes($_POST['makeSelection']);
        $searchModel = addslashes($_POST['modelSelection']);
        $searchBranch = addslashes($_POST['branchSelection']);
        $searchYear = addslashes($_POST['yearSelection']);
        $minPrice = addslashes($_POST['minPriceSelection']);
        $maxPrice = addslashes($_POST['maxPriceSelection']);

        $sql = "SELECT Id, Make, Model, Year, Price, SpecialPrice, Branch, StockNO FROM Vehicle";

        if ($searchMake || $searchBranch || $minPrice || $maxPrice) {
            $sql .= "WHERE ";
        }

        $combine = '';

        if ($minPrice) {
            $sql .="{$combine}Price BETWEEN $minPrice "; $combine = 'BETWEEN ';
        }

        if ($maxPrice) {
            $sql .="AND $maxPrice "; $combine = 'AND ';
        }

        if ($searchMake) {
            $sql .="{$combine}Make LIKE '%$searchMake%' "; $combine = 'AND ';
        }

        if ($searchBranch) {
            $sql .="{$combine}Branch LIKE '%$searchBranch%' ";
        }

        $rs = odbc_exec($conn, $sql);

        $rs = odbc_exec($conn, $sql);

        if (odbc_num_rows( $rs ) == -1) {

            echo "We don’t have the vehicle you are looking for right now, but send us your vehicle requirements and we will be sure to find you one!";

        } else {

            echo "\t" . "<tr>\n";

            echo "\t" . "<th>Make</th><th>Model</th><th>Year</th><th>Price</th><th>Special Price</th><th>Location</th><th>Stock Number</th>" . "\n";

            while (odbc_fetch_row($rs)) { 
                $id = odbc_result($rs, Id);
                $make = odbc_result($rs, Make);
                $model = odbc_result($rs, Model);
                $year = odbc_result($rs, Year);
                $price = odbc_result($rs, Price);
                $specialPrice = odbc_result($rs, SpecialPrice);
                $branch = odbc_result($rs, Branch);
                $stockNo = odbc_result($rs, StockNO);

                echo "\t" . "<tr>\n";
                echo "\t\t" . "<td><a href=/selected-vehicles?Id=$id>" . $make . "</td><td><a href=/selected-vehicles?Id=$id>" . $model . "</a></td><td>" . $year . "</td><td>" . $price . "</td><td>" . $specialPrice . "</td><td>" . $branch . "</td><td>" . $stockNo . "</td>\n";

                echo "\t" . "</tr>\n";
            }

        }

      odbc_free_result($rs);
      odbc_close($conn);

任何帮助将不胜感激。

Answer 1

删除这一行：

  if (odbc_fetch_row($rs) === TRUE) {

您已经在此处获取第一个条目，但您没有使用结果..

用它来检查它是否为空：

if(odbc_num_rows( $rs ) == 0){
        // when no result
} else {
        // when result
}