如何从Laravel中的数组中获取值

Question

I have a 3 level category. I need to gain businesses on level 3 category.

I write this code:

$main_cat = Category::where(['slug' => $url])->first();
$lev_cat2 = Category::where(['parent_id' => $main_cat->id, 'status' => '1'])->get();
 foreach ($lev_cat2 as $subCategory) {
            $cat_ids_lv2[] = $subCategory->id . ',';
        }
 foreach ($lev_cat2 as $subCat) {
            $lev_cat3[] = Category::where(['parent_id' => $subCat->id, 'status' => '1'])->pluck('id')->toArray();
        }

dd($lev_cat3);

Then I got this array which is correct:

array:5 [▼
  0 => array:3 [▼
    0 => 145
    1 => 146
    2 => 147
  ]
  1 => array:3 [▼
    0 => 148
    1 => 149
    2 => 150
  ]
  2 => array:3 [▼
    0 => 151
    1 => 152
    2 => 153
  ]
  3 => array:3 [▼
    0 => 154
    1 => 155
    2 => 156
  ]
  4 => []
]

now I dont know how can I get values like 145,146,147,148,149,... to pass theme to

Business::where(['category_id'=> [145,146,147,148,...]]->get();

of course dynamic.

Answer 1

You can use laravel collection helpers :

Business::whereIn('category_id', collect($lev_cat3)->flatten()->all())->get();