Question

我正从我的一个小型数据库表开发一个小型搜索引擎。但无论我搜索它，它只显示一个结果。请帮我正确地做到这一点......

由于

HTML表单：

<form action="search_page.php" method="post">
    <select name="search_type" id="search_type" required>
        <option value="*" selected disabled>Search By...</option>
        <option value="name">Name</option>
        <option value="mailing_address">Mailing Address</option>
        <option value="permanent_address">Permanent Address</option>
        <option value="current_prof_1">Profession</option>
    </select>
    <input type="search" name="search" placeholder="Search Here..." required>
    <button type="submit" name="search_start" class="search_button">Search</button>
</form>

和php查询代码：

 <?php
    if (isset($_POST['search_start'])) {
        $search_by = $_POST['search_type'];
        $search_for = $_POST['search'];

        $search_query="SELECT * FROM member Where $search_by like '%$search_for%'";
        $search_pull = mysqli_query($connection, $search_query);
        $search_count = mysqli_num_rows($search_pull);
        if ($search_count > 0 ) {
            $serial = 1;
            while ($row = mysqli_fetch_array($search_pull)) {
                $member_id = $row["id"];
                $name = ucwords($row["name"]);
                $batch = $row["batch"];

                $search_members ="<tr>";
                $search_members .="<td>$serial</td>";
                $search_members .="<td>$name</td>";
                $search_members .="<td>$batch</td>";
                $search_members .="</tr>";
                ++$serial;
            }
        }
    }
?>

Answer 1

更改

$search_members ="<tr>";

到

$search_members .="<tr>";

您每次都在循环中初始化打印字符串。

您需要将其与相应的记录连接起来。

有了这个错字，你的结果就是每次用while循环中的最新记录来写。

另外，请初始化

$search_members = '';

如果返回零行，则在while循环之前

，它不应返回未定义的变量错误。

Answer 2

用以下代码替换您的代码：

<?php
if (isset($_POST['search_start'])) {
    $search_by = $_POST['search_type'];
    $search_for = $_POST['search'];

    $search_query="SELECT * FROM member Where $search_by like '%$search_for%'";
    $search_pull = mysqli_query($connection, $search_query);
    $search_count = mysqli_num_rows($search_pull);
    if ($search_count > 0 ) {
        $serial = 1;
        $search_members='';
        while ($row = mysqli_fetch_array($search_pull)) {
                $member_id = $row["id"];
                $name = ucwords($row["name"]);
                $batch = $row["batch"];

                $search_members .="<tr>";
                $search_members .="<td>$serial</td>";
                $search_members .="<td>$name</td>";
                $search_members .="<td>$batch</td>";
                $search_members .="</tr>";
                ++$serial;
            }
        }
    }
?>

Mysql搜索查询从数据库返回一个结果

2 个答案: