Question

想知道是否有人可以帮我解决这个问题。我在第20行（开头的行：while（$ row = mysqli_fetch ...）

谢谢！：）

<?php
function dispcategories() {
    include ('connection.php');

    $select = mysqli_query($DBconnect, "SELECT * FROM categories");

    while ($row = mysqli_fetch_assoc($select)) {
        echo "<table class='category-table'>";
        echo "<tr><td class='main-category' colspan='2'>".$row['category_title']."</td></tr>";
        dispsubcategories($row['cat_id']);
        echo "</table>";
    }
}

function dispsubcategories($parent_id) {
    include ('connection.php');
    $select = mysqli_query($DBconnect, "SELECT cat_id, subcat_id, subcategory_title, subcategory_desc FROM categories, subcategories 
                                  WHERE ($parent_id = categories.cat_id) AND ($parent_id = subcategories.parent_id)");
    echo "<tr><th width='90%'>Categories</th><th width='10%'>Topics</th></tr>";
    while ($row = mysqli_fetch_assoc($select)) {
        echo "<tr><td class='category_title'><a href='/forum-tutorial/topics/".$row['cat_id']."/".$row['subcat_id']."'>
              ".$row['subcategory_title']."<br />";
        echo $row['subcategory_desc']."</a></td>";
        echo "<td class='num-topics'>".getnumtopics($parent_id, $row['subcat_id'])."</td></tr>";
    }
}

Answer 1

为了按照你想要的方式做你正在做的事情，你需要将MYSQLI_USE_RESULT标志传递给查询：

$select = mysqli_query($DBconnect, "SELECT cat_id, subcat_id, subcategory_title, subcategory_desc FROM categories, subcategories 
                              WHERE ($parent_id = categories.cat_id) AND ($parent_id = subcategories.parent_id)", MYSQLI_USE_RESULT);

mysqli_fetch_assoc（）期望参数1为mysqli_result，给定布尔值

1 个答案: