foreach 循环内的多维数组

Question

我有这个类别列表，我正在其中创建菜单规划器这段代码正在运行，下面给出了这段代码的输出，

 $categoryList=Category::where('user_id',$id)->get();   
    $meal_day=array('1'=>'Monday','2'=>'Tuesday','3'=>'Wednesday','4'=>'Thursday','5'=>'Friday','6'=>'Saturday','7'=>'Sunday');
    $meal_plan=[];
    $i= 0;
    foreach($categoryList as $catKey => $row) {
        for($k=1;$k<=count($meal_day);$k++) {$menuPlanner=MenuPlanner::where(['day'=>$k,'user_id'=>auth()->user()->id,'category_id'=>$row['id']])->first(); 
            if($menuPlanner) {
                $product = Product::where(['id'=>$menuPlanner->product_id])->first();
                $meal_plan[$catKey][$k]['product_title']=$product->title;
            }
        }
    }

输出：

array:2 [
  0 => array:7 [
    1 => array:1 [
      "product_title" => "Product 1"
    ]
    2 => array:1 [
      "product_title" => ""
    ]
    3 => array:1 [
      "product_title" => ""
    ]
    4 => array:1 [
      "product_title" => ""
    ]
    5 => array:1 [
      "product_title" => ""
    ]
    6 => array:1 [
      "product_title" => ""
    ]
    7 => array:1 [
      "product_title" => ""
    ]
  ]
  1 => array:7 [
    1 => array:1 [
      "product_title" => "Product 2"
    ]
    2 => array:1 [
      "product_title" => ""
    ]
    3 => array:1 [
      "product_title" => ""
    ]
    4 => array:1 [
      "product_title" => ""
    ]
    5 => array:1 [
      "product_title" => ""
    ]
    6 => array:1 [
      "product_title" => ""
    ]
    7 => array:1 [
      "product_title" => ""
    ]
  ]

但我在第一个菜单计划器中有多个产品

 $menuPlanner=MenuPlanner::where(['day'=>$k,'user_id'=>auth()->user()->id,'category_id'=>$row['id']])->get(); 
       
 foreach($menuPlanner as $menuKey => $menurow) {
     $product = Product::where(['id'=>$menurow->product_id])->first();
     $meal_plan[$catKey][$k]['product_title']=$product->title;
 }

那么如何在数组索引中存储多个产品？

Answer 1

必须将索引 ['product_title'] 视为一个数组，并且在该数组中，必须使用 array_push.

推入产品标题

这样您就可以拥有多个个产品标题。

看下面的例子：

<?php
    
    $menuPlanner=MenuPlanner::where(['day'=>$k,'user_id'=>auth()->user()->id,'category_id'=>$row['id']])->get(); 
    
    //DECLARE THE INDEX AS AN ARRAY
    $meal_plan[$catKey][$k]['product_title'] = array();
    
    foreach($menuPlanner as $menuKey => $menurow)
    {
        $product = Product::where(['id'=>$menurow->product_id])->first();
        
        //PUSH TITLE INTO THE ARRAY
        array_push($meal_plan[$catKey][$k]['product_title'], $product->title);
        
    }
    
?>

foreach 循环内的多维数组

Multidimensional array inside foreach loop

php

laravel

laravel-5