Question

好的伙计们，下面的代码运行正常。除了因为我为用户提供了最多4个图像下载，产品预览页面应该只显示其中一个图像，如产品页面中阵列中的第一个图像，但如果用户上传了4个图像，则显示所有行。我怎么能限制这个？感谢。

<?php           
        echo 'Your posts:' . '<br>' . '<hr>'; 

        $posts = "SELECT * FROM posts,image_data WHERE userid='$user' AND user_posts.userid = image_data.client_id ORDER BY date_created ASC";
        $posts_result = $mysqli->query($posts);     
        while ($posts_result_rows = $posts_result->fetch_assoc()) {
            $its_id = $posts_result_rows["userid"];
                        $its_title = $posts_result_rows['post_title']; 
                        $its_image = $posts_result_rows['file'];
                        $its_description = $posts_result_rows['post_description'];
        ?>
        <table border=0 cellpadding=5 cellspacing=0 >
            <tr>
                        <?php echo '<br>' . $its_title . ' <br>' . $its_description . '<br>'; ?>
                        <img src="<?php echo "users_data/users_posted_data/".$its_image; ?>" alt="<?php echo $its_title; ?>" width="120" height="120"><hr>                   
            </tr>
        </table>
        <?php 
            }
        ?>

Answer 1

尝试添加LIMIT 1

$posts = "SELECT * FROM posts,image_data WHERE userid='$user' AND user_posts.userid = image_data.client_id ORDER BY date_created ASC LIMIT 1";
        $posts_result = $mysqli->query($posts);

Answer 2

<?php           
        echo 'Your posts:<br><hr>'; 

        $posts = "SELECT * FROM posts,image_data WHERE userid='$user' AND user_posts.userid = image_data.client_id ORDER BY date_created ASC";
        $posts_result = $mysqli->query($posts);     
        while ($posts_result_rows = $posts_result->fetch_assoc()) {
            $its_id = $posts_result_rows["userid"];
                        $its_title = $posts_result_rows['post_title']; 
                        $its_image = $posts_result_rows['file'];
                        $its_description =     $posts_result_rows['post_description'];

            echo "<table border=0 cellpadding=5 cellspacing=0 ><tr><td>"; 
            echo '<br>' . $its_title . ' <br>' . $its_description . '<br>';

        }
    ?>   
<img src="<?php echo "users_data/users_posted_data/".$its_image; ?>" alt="<?php echo $its_title; ?>" width="120" height="120"><hr>                   
        </td></tr>
    </table>

Answer 3

重要的是添加limit 1。

SELECT * FROM posts,image_data WHERE userid='$user' AND user_posts.userid = image_data.client_id ORDER BY date_created ASC limit 1

如何仅显示帖子的第一行？

3 个答案: