php - 在php中的foreach循环中使用where条件

Question

嘿伙计们，我昨天有一个想法。你能帮我解决这个问题吗？这是代码

foreach($categoriesDetail as $categories)
{
    foreach($subCategoriesDetail as $subCategories)
    {
        if($categories->id == $subCategories->cat_id)
        {
            foreach($teamsDetail as $team)
            {
                if($subCategories->id == $team->sub_cat_id)
                {
                    echo $team->name;
                }
            }
        }
    }
}

该意志将运行并产生正确的结果，但我希望不要运行额外的迭代。换句话说

foreach($categoriesDetail as $categories)
{
    foreach($subCategoriesDetail as $subCategories where $categories->id == $subCategories->cat_id)
    {
        foreach($teamsDetail as $team where $subCategories->id == $team->sub_cat_id)
        {
            echo $team->name;
        }
    }
}

我知道这在 php 或任何其他语言中都是不可能的，但我想要一个替代方案，或者将来他们可能会添加它以提高性能。

Answer 1

您可以更改数组的结构方式，使其采用以下形式:

$subCategoriesDetail[$cat_id] = array();

$teamsDetail[$sub_cat_id] = array();

然后你会使用:

foreach($categoriesDetail as $categories)
{
    foreach($subCategoriesDetail[$categories->id] as $subCategories)
    {
        foreach($teamsDetail[$subCategories->id] as $team)
        {
            echo $team->name;
        }
    }
}