如何根据组和项目数生成列？

Question

我有不同类别的数据。 例如：沙拉、甜点

我想根据类别对它们进行分组，并且每列也只有 5 个项目。

 <div>
<h3>Salads</h3>
<div>
salad 0
salad 1
salad 2
salad 3
salad 4
</div>
<div>
salad 5
salad 6
salad 7
salad 8
salad 9
salad 10
</div>
<div>
salad 11
</div>
</div>

    <div> 
    <h3> Desserts</h3>
<div>
Dessert 1
Dessert 2
Dessert 3
Dessert 4
Dessert 5
</div>

    <div>
    Dessert 6
    </div>

        </div>

如何使用 php 实现它？需要帮忙。提前致谢。

这是我正在使用的代码。此代码的问题是，如果该类别的项目数为偶数，则它不起作用。如果是奇数个项目，那么它完全可以工作。

    $itemsperrow = 2;

$sql_menugrouptbl = "SELECT category FROM ck_menulist GROUP BY category ORDER BY id";
$result = $conn->query($sql_menugrouptbl);
$result->execute(); 
echo "Total category: ". $result->rowcount(); 

foreach($result as $row){

    $categ = $row['category'];



    $sql_menulisttbl = "SELECT * FROM ck_menulist WHERE category  = '$categ'";
    $stmt = $conn->Prepare($sql_menulisttbl); 
    $stmt ->execute();
    $countmenulist = $stmt->rowcount();
    echo "<h1>".$categ." (".$countmenulist.")</h1>"; 

    foreach($stmt as $rowitem){

    if ($countmenulist % $itemsperrow == 1)
    {  
       echo "<div class=\"col-md-4 jt_col column_container\">";    
       echo "<div class=\"voffset10\"></div>";
       echo "<ul class=\"menu\">";
    }
       echo "<li>";
       echo $rowitem['itemname'];
       echo "<div class=\"detail\">".$rowitem['itemdescription']." <span class=\"price\">$ ".$rowitem['price']."</span></div>";
       echo "</li>";

    if ($countmenulist%$itemsperrow == 0)
    {
        echo "\n";
        echo "</div>";
        echo "\n";
    }
    $countmenulist++;

    }



      if ($countmenulist%$itemsperrow != 1) {
            echo "\n";
            echo "</div>";
        }

    }

Answer 1

尝试像下面这样拆分数组：

$sql_menugrouptbl = "SELECT category FROM ck_menulist GROUP BY category ORDER BY id";
$result = $conn->query($sql_menugrouptbl);
$result->execute(); 
echo "Total category: ". $result->rowcount(); 

foreach($result as $row){

    $categ = $row['category'];



    $sql_menulisttbl = "SELECT * FROM ck_menulist WHERE category  = '$categ'";
    $stmt = $conn->Prepare($sql_menulisttbl); 
    $stmt ->execute();
    $countmenulist = $stmt->rowcount();
    echo "<h1>".$categ." (".$countmenulist.")</h1>"; 

    $splitted_item = array_chunk($stmt, $itemsperrow, true);
    foreach($splitted_item as $sub_menu){
        echo "<div class=\"col-md-4 jt_col column_container\">";    
        echo "<div class=\"voffset10\"></div>";
        echo "<ul class=\"menu\">"; 
        foreach($sub_menu as $rowitem){
            echo "<li>";
            echo $rowitem['itemname'];
            echo "<div class=\"detail\">".$rowitem['itemdescription']." <span class=\"price\">$ ".$rowitem['price']."</span></div>";
            echo "</li>";
        }
        echo "</ul>"; 
        echo "\n";
        echo "</div>";
        echo "\n";
    }
}