将图像阵列排序为图库列

时间:2013-01-02 09:17:29

标签: php image gallery sinemacula

这个问题是从我之前的here问题中继续进行的。

但是,我想用最基本的术语来说明这一点,希望有人能够帮助我找到解决方法。

考虑这个多维数组:

$images = array(
    0 = array(
        'height' => 100
    ),
    1 = array(
        'height' => 90
    ),
    2 = array(
        'height' => 60
    ),
    3 = array(
        'height' => 30
    )
);

请注意,数组已按高度降序排序!

这些图像需要被推入三列,同时尽可能地保持列的高度。因此,结果数组(上例)将如下所示:

$gallery_columns = array(
    1 => array(
        'height' => 100
        'images' => array(
            0 = array(
                'height' => 100
            ),
        )
    ),
    2 => array(
        'height' => 90
        'images' => array(
            0 = array(
                'height' => 90
            ),
        )
    ),
    3 => array(
        'height' => 90
        'images' => array(
            0 = array(
                'height' => 60
            ),
            1 = array(
                'height' => 30
            ),
        )
    )
);

我正在努力编写一个算法来实现上述目标。没有使用大量嵌套循环等,任何人都能看到实现这个目标的好方法吗?

1 个答案:

答案 0 :(得分:1)

这可能就是你要找的东西:

$images = array(
    0 => array(
        'height' => 100
    ),
    1 => array(
        'height' => 90
    ),
    2 => array(
        'height' => 60
    ),
    3 => array(
        'height' => 30
    )
);

$gallery_columns = array(
    1 => array(
        'height' => 0,
        'images' => array()
    ),
    2 => array(
        'height' => 0,
        'images' => array()
    ),
    3 => array(
        'height' => 0,
        'images' => array()
    )
);



foreach ($images as $img)
{
    // start with first column as the shortest
    $shortest_colm = &$gallery_columns[1];

    // loop over all the columns, updating the shortest column if shorter
    for ($i = 2; $i <= 3; $i++)
    {
        if ($gallery_columns[$i]['height'] < $shortest_colm['height'])
        {
            $shortest_colm = &$gallery_columns[$i];
        }
    }

    // push the image into the shortest column
    $shortest_colm['height'] += $img['height'];
    $shortest_colm['images'][] = $img;
}

print_r($gallery_columns);

输出:

Array
(
    [1] => Array
        (
            [height] => 100
            [images] => Array
                (
                    [0] => Array
                        (
                            [height] => 100
                        )

                )

        )

    [2] => Array
        (
            [height] => 90
            [images] => Array
                (
                    [0] => Array
                        (
                            [height] => 90
                        )

                )

        )

    [3] => Array
        (
            [height] => 90
            [images] => Array
                (
                    [0] => Array
                        (
                            [height] => 60
                        )

                    [1] => Array
                        (
                            [height] => 30
                        )

                )

        )

)

<强>加成:

foreach($gallery_columns as &$column)
{
    shuffle($column['images']);
}

由于您按照从大到小的顺序插入图像,所以插入后可以随机播放图像。这样,它不会在顶部显示所有大图像,在底部显示小图像。