Laravel从每个阵列怎么样？

this is the result of a Foreach loop get method using dd$($value),

Questions: how do i convert this inside my controller into an array and store it into my database

Example: [Lead_id1=Subjectid1 , Lead_id2=Subjectid1, Lead_id3=Subjectid1] so on and so fort..

Note: Lead_id and Subject_id are both FK there for the value must be integer Not String

Controller:

public function store(Request $request)
{
    $value=$request->all();
    $subjects = $value['Subject_id'] ?? [];
    $leads = $value['Lead_id'] ?? [];
    $data = [];
     foreach ($subjects as $subject) {
     $data[] = array_combine($leads, array_fill(0, count($leads), $subject));

    $scores=new Score;
    $scores->Subject_id=$request->input('Subject_id');
    $scores->Lead_id=$request->input('Lead_id');
   dd($scores);
    $scores->save();
}

this is the result

Score Model

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Score extends Model
{
    protected $guarded = [
        'id',
        'Year_id',
        'Term_id',
        'Level_id',
        'Classes_id',
        'Subject_id',
        'Lead_id',
    ]; 
}

You said Lead_id and Subject_id both are foreign key then you can simply use ManyToMany relation in laravel and save the data accordingly

Subject Model

class Subject extends Model{
   public function leads(){
     return $this->belongsToMany(Lead::class, 'scores', 'Subject_id', 'Lead_id');
   }
}

Lead Model

class Lead extends Model{
   public function subjects(){
     return $this->belongsToMany(Subject::class, 'scores', 'Lead_id', 'Subject_id');
   }  
}

Questions: how do i convert this inside my controller into an array and store it into my database

foreach($data['Subject_id'] as $subjectId){
    $subject = Subject::find($subjectId);
    $leadids = $data['Lead_id'];
    $subject->leads()->attach($leadids);
}

For details check this https://laravel.com/docs/5.6/eloquent-relationships#many-to-many

You can try -

$temp = [];
$subject = !empty($value['Subject_id'][0]) ? $value['Subject_id'][0] : null; // extract the subject id
// Loop through lead ids
foreach($value['Lead_id'] as $lead) {
    $temp[$lead] = $subject; // store subject id fro lead ids
}

You may try following :

public function store(Request $request)
{
    $value=$request->all();
    $subjects = $value['Subject_id'] ?? [];
    $leads = $value['Lead_id'] ?? [];
    $data = [];

    foreach ($subjects as $subject) {
        $data[] = array_combine($leads, array_fill(0, count($leads), $subject));
    }

    foreach ($data as $load => $subject) {
        $scores = new Score;
        $scores->Subject_id = $subject;
        $scores->Lead_id = $load;
        $scores->save();
        dd($scores);
    }  
}

convert the array first into a json string

json_encode($array);

before store it to the database