Php 嵌套数组中的多维数组

我有一个脚本，它遍历一个CSV文件，并将每一行作为一个数组放入另一个数组（嵌套数组？）。每行有2-3个字段用于该行中项目的类别。我正在尝试如何从这些类别中创建多维数组。以下是我目前掌握的资料来源：

$csv = new File_CSV_DataSource;
if ($csv->load($file)) {
    $items = $csv->getHeaders();
    $csv->getColumn($items[2]);
    if ($csv->isSymmetric()) {
        $items = $csv->connect();
    } else {
        $items = $csv->getAsymmetricRows();
    }
    $items = $csv->getrawArray();
}

$mainCats = array();
$subCats = array();
$subSubs = array();

foreach($items as $item){
    if(!in_array($item[10], $mainCats)){
        $mainCats[] = $item[10];
    }
}

foreach($items as $item){
    if(!array_key_exists($item[11], $subCats)){
        $parent = array_search($item[10], $mainCats);
        $subCats[$item[11]] = $parent;
    }
}

foreach($items as $item){
    if(!array_key_exists($item[12], $subSubs)){
        $parent = array_search($item[11], array_keys($subCats));
        $subSubs[$item[12]] = $parent;
    }
}

到目前为止，它所做的是创建3个数组，格式为：

$mainCats = Array(
    [0] => Main Cat 1,
    [1] => Main Cat 2,
    [2] => Main Cat 3
);

$subCats = Array(
    [Sub Cat 1] => 0,
    [Sub Cat 2] => 1,
    [Sub Cat 3] => 2
);

$subSubs = Array(
    [Sub Sub 1] => 0,
    [Sub Sub 2] => 1,
    [Sub Sub 3] => 2
);

$cats = Array(
    [0] => Array(
        'name' => Main Cat 1,
        'subs' => Array(
            [0] => Array(
                'name' => Sub Cat 1,
                'subs' => Array(
                    'name' => Sub Sub 1
                )
            )
        )
    ),
    [1] => Array(
        'name' => Main Cat 2,
        'subs' => Array(
            [0] => Array(
                'name' => Sub Cat 2,
                'subs' => Array(
                    'name' => Sub Sub 2
                )
            )
        )
    ),
    [2] => Array(
        'name' => Main Cat 3,
        'subs' => Array(
            [0] => Array(
                'name' => Sub Cat 3,
                'subs' => Array(
                    'name' => Sub Sub 3
                )
            )
        )
    ),
);

最后两个数组中每个数组的数值都是前一个数组中其父类别的索引。我想做的是将它们合并成一个大数组，格式如下：

$mainCats = Array(
    [0] => Main Cat 1,
    [1] => Main Cat 2,
    [2] => Main Cat 3
);

$subCats = Array(
    [Sub Cat 1] => 0,
    [Sub Cat 2] => 1,
    [Sub Cat 3] => 2
);

$subSubs = Array(
    [Sub Sub 1] => 0,
    [Sub Sub 2] => 1,
    [Sub Sub 3] => 2
);

$cats = Array(
    [0] => Array(
        'name' => Main Cat 1,
        'subs' => Array(
            [0] => Array(
                'name' => Sub Cat 1,
                'subs' => Array(
                    'name' => Sub Sub 1
                )
            )
        )
    ),
    [1] => Array(
        'name' => Main Cat 2,
        'subs' => Array(
            [0] => Array(
                'name' => Sub Cat 2,
                'subs' => Array(
                    'name' => Sub Sub 2
                )
            )
        )
    ),
    [2] => Array(
        'name' => Main Cat 3,
        'subs' => Array(
            [0] => Array(
                'name' => Sub Cat 3,
                'subs' => Array(
                    'name' => Sub Sub 3
                )
            )
        )
    ),
);

我知道必须有一种更有效的方法来做这件事，但我想不出来

---

编辑-我还应该提到，并非所有行都有第三类字段值。

我更喜欢按名称对它们进行索引：

$cats=array();
//--------
foreach($items as $item){
        $main=$item[10];
        $subCat=$item[11];
        $subSub[$item[12]];
        $cats[$main]['subs'][$subCat]['subsubs'][$subSub]['name']=$subSub;
        $cats[$main]['subs'][$subCat]['name']=$subCat;
        $cats[$main]['name']=$main;



}

---

你确定你需要潜艇吗？它可以引起亚亚亚群。。。将他们设置为孩子。将在一瞬间回答。只有三层分类的可能性。在某些情况下，子类别是绝对必需的。在某些行中不是。