Question

我有一张桌子。在表格中，有标题customerID，名称，城市，地址。它们位于表格的顶部，它们是指向同一页面的链接。

我想要做的是，如果我在表格中按名称，它会将所有名称按顺序放入列中;与customerID相同，如果我按下链接，它将订购列中的所有数字。

我有

if ($_POST['sort'] == 'customerid') {
    $query .= " ORDER BY customerid";
} elseif ($_POST['sort'] == 'name') {
    $query .= " ORDER BY name";
} elseif ($_POST['sort'] == 'city') {
    $query .= " ORDER BY city";
} elseif ($_POST['sort'] == 'address') {
    $query .= " ORDER BY address";
}

但我不确定它在代码中的意义，所以任何帮助都会非常感激

我希望你们能帮忙。

   <html>
    <head>
    </head>
    <body>
        <?php
        $options = array(
            PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',
        );
        $dsn = 'mysql:host=localhost;dbname=agmarcel';
        $password = 'asdf';
        $username = 'agmarcel';
        $db = new PDO($dsn, $username, $password, $options);

        $query = "SELECT";

        if ($_POST['sort'] == 'customerid') {
            $query .= " ORDER BY customerid";
        } elseif ($_POST['sort'] == 'name') {
            $query .= " ORDER BY name";
        } elseif ($_POST['sort'] == 'city') {
            $query .= " ORDER BY city";
        } elseif ($_POST['sort'] == 'address') {
            $query .= " ORDER BY address";
        }
        $stmt = $db->prepare($query);
        $stmt->execute();

        echo "<table border=2>";
        echo "<tr>";
        echo "<th><a href="mypage.php?sort = customerid">Customer ID:</a></th>";
        echo "<th><a href="mypage.php?sort = name">Name:</a></th>";
        echo "<th><a href="mypage.php?sort = city">City:</a></th>";
        echo "<th><a href="mypage.php?sort = address">Address:</a></th>";
        echo "</tr>";

        while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
            echo "<tr>";
            $customerid = $row['customerid'];
            $name = $row['name'];
            $city = $row['city'];
            $address = $row['address'];


            echo "<td>Customer ID: $customerid</td>";
            echo "<td>$name</td>";
            echo "<td>$city</td>";
            echo "<td>$address</td>";
            echo "</tr>";
        }
        echo "</table>";
        ?>      
    </body>  
</html>

Answer 1

更改$query = "SELECT"

到

    $query  = "SELECT * from your tablename";



    if ($_POST['sort'] == 'customerid')
    {
        $query .= " ORDER BY customerid";
    }
    elseif ($_POST['sort'] == 'name')
    {
        $query .= " ORDER BY name";
    }
    elseif ($_POST['sort'] == 'city')
    {
        $query .= " ORDER BY city";
    }
    elseif($_POST['sort'] == 'address')
    {
        $query .= " ORDER BY address";
    }

如何使用链接在表中按字母顺序排序列并使用PHP，MySQL？

1 个答案: