将 id 传递给视图中的超链接的 href

Question

In my laravel application I'm aiming to display plan id when I hover over a link. Basically get the id of the plan's table from the database. I'm getting an error of:

Undefined variable: plan  

Controller:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Plan;


class PlanController extends Controller
{

    public function getPlan(Request $request, $id){

          $plan = Plan::find($id);


        return redirect()->route('index');

    }

}

Routes:

Route::get('/plan_id/{id}', [

    'uses' => 'PlanController@getPlan',
    'as' => 'get-plan'

]);

View with the link:

  <a href="{{route('get-plan', ['id' => $plan->id])}}" type="submit" id="basic" class="btn btn-primary btn-lg btn-block">Sign up with Basic </a>

Answer 1

You should return the view where you're building the link, instead of using redirecting:

return view('view', compact('plan'));

And as I told you in your other question, if you're using redirect, you should use ->with('plan', $plan); to flash data into the session.

Answer 2

In that code, the variable $plan is local to the function. It does not have external scope. You can either declare it as global

global $plan;

or use public variable on the class:

$this->plan