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php - foreach 循环内的多维数组

问题描述

我有这个类别列表，我正在创建菜单规划器，这个代码正在工作，下面给出了这个代码的输出，

 $categoryList=Category::where('user_id',$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" => ""
    ]
  ]

但我首先在菜单规划器中有多个产品

 $menuPlanner=MenuPlanner::where(['day'=>$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;
 }

那么我将如何在数组索引中存储多个产品呢？

标签： phplaravellaravel-5

解决方案

索引['product_title']必须被视为一个数组，并且在该数组中，产品标题必须使用array_push.

通过这种方式，您可以拥有多个产品标题。

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);
        
    }
    
?>

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