Question

布局是块/模块化的，所以我需要为每个div应用一个类。问题是，当我在浏览器中预览时，在代码循环再次从案例1开始之后 - 它会跳过数据库中的一个项目，并将下一个项目显示为案例1.

     $result = mysqli_query($connection, "SELECT * FROM products");
        $index = 1;
        while($row = mysqli_fetch_array($result)) {

        $float = "";

            switch ($index) {
                case 1: $float = "large-left";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 2: $float = "mini-left";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 3: $float = "mini-right";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 4: $float = "mini-left";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 5: $float = "mini-right";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 6: $float = "large-right";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 7: $float = "mini-left";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 8: $float = "mini-right";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 9: $float = "mini-left";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                case 10: $float = "mini-right";
                        echo "<div class=\"$float\"><img src=\"" . $row['product_imagepath'] . "\"/></div>";
                    break;
                default: $index = 0;
                    break;
            };          

        $index++;
        };

        mysqli_close($result);
    ?>

非常感谢任何建议/替代方法！

Answer 1

你给$ index作为1

$index = 1;

因此，每次都会进入案例1。它不是动态的。

Answer 2

如果我理解正确，你想要“分组”10种产品

$result = mysqli_query($connection, "SELECT * FROM products");
$index = 1;
while($row = mysqli_fetch_array($result)) {
     if ($index % 10 == 1) {
         $float = 'large-left';
     }
     else {
         if($index % 2 == 1) {
             $float = 'mini-right';
         }
         else {
             $float = 'mini-left';
         }
     }
     echo '<div class="' . $float . '"><img src="' . $row['product_imagepath'] . '"></div>';
     $index++;
}

使用switch语句从数据库调用：PHP

2 个答案: