(php) 我在 "get" 方法 link 中得到了额外的代码

Question

我在溢出中的第一个问题:)

我试图创建一个 table 来显示来自 SQL 的所有帖子。我已经完成了下一个代码：

function show_all_posts_in_table(){
        global $connection;
        $query = "SELECT * FROM posts";
        $all_posts_content_query = mysqli_query($connection,$query);

        while ($row = mysqli_fetch_assoc($all_posts_content_query)) {
            $post_id_display = $row['post_id'];
            echo "<tr>";
            echo "<td>" . $post_id_display = $row['post_id'] . "</td>";
            echo "<td>" . $post_category_display = $row['post_category_id'] . "</td>";
            echo "<td>" . $post_title_display = $row['post_title'] . "</td>";
            echo "<td>" . $post_author_display = $row['post_author'] . "</td>";
            echo "<td>" . $post_date_display = $row['post_date'] . "</td>";
            $post_image_display = $row['post_image'];
            echo "<td>" . "<img src= '../images/{$post_image_display}' width='200' height='auto'>" . "</td>";
            echo "<td>" . $post_content_display = $row['post_content'] . "</td>";
            echo "<td>" . $post_tags_display = $row['post_tags'] . "</td>";
            echo "<td>" . $post_status_display = $row['post_status'] . "</td>";
            echo "<td>{$post_id_display}</td>";
            echo "<td> <a href='posts.php?delete={$post_id_display}'>DELETE</a> </td>";
            echo "</tr>";
}
}

我看到了我创建的 table 中的所有帖子，一切正常。

问题是当我尝试删除其中一个帖子时（使用 "get" 方法删除 href）。

出于某种原因我无法理解，在 chrome 的地址行上我得到了一个额外的 </td>.

我被引导至：posts.php?delete=6</td>。

谁能理解为什么会这样？

谢谢！

Answer 1

$post_id_display = $row['post_id'] . "</td>"; 会将 $post_id_display 设置为 $row['post_id']，然后将 </td> 连接到它。

无需将这些值存储在单独的变量中。直接使用 $row 数组即可。

改为：

while ($row = mysqli_fetch_assoc($all_posts_content_query)) {
    echo "<tr>";
    echo "<td>" . $row['post_id'] . "</td>";
    echo "<td>" . $row['post_category_id'] . "</td>";
    echo "<td>" . $row['post_title'] . "</td>";
    echo "<td>" . $row['post_author'] . "</td>";
    echo "<td>" . $row['post_date'] . "</td>";
    echo "<td>" . "<img src= '../images/" . $row['post_image'] . "' width='200' height='auto'>" . "</td>";
    echo "<td>" . $row['post_content'] . "</td>";
    echo "<td>" . $row['post_tags'] . "</td>";
    echo "<td>" . $row['post_status'] . "</td>";
    echo "<td>" . $row['post_id'] . "</td>";
    echo "<td> <a href='posts.php?delete=" . $row['post_id'] . "'>DELETE</a> </td>";
    echo "</tr>";

...它应该可以工作。

Answer 2

作为对@MagnusEriksson 的回答的扩展，只是 test/simplification 正在发生的事情：

你现在在做什么：

$a = "A";
$b = "B";
echo "x" . $a = $b . "y"; // -> xBy
echo " value of A: ".$a; // -> value of A: By

这可行：

$a = "A";
$b = "B";
echo "x" . ($a = $b) . "y"; // -> xBy
echo " value of A: ".$a;  // -> value of A: B

(php) 我在 "get" 方法 link 中得到了额外的代码

(php) I get extra code in "get" method link

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