Invalid argument supplied for foreach() Facade\Ignition\Exceptions\ViewException - php

Question

The code runs fine without the #foreach statement. When it's added I get the following error:
Undefined variable: articles (View: C:\laravel\laravel\resources\views\about.blade.php)
$articles is undefined.
Make the variable optional in the blade template. Replace {{ $articles }} with {{ $articles ?? '' }}
When I add the ?? '' it creates the error:
Facade\Ignition\Exceptions\ViewException
Invalid argument supplied for foreach()
Here is the complete code for the more daring:
https://github.com/matthoek/Articles
This is my view:
<? if (is_array($articles) || is_object($articles)) ?>
{
#foreach ($articles ?? '' as $article)
{
<li class = "first">
<h3>{{ $article->title}}</h3>
<p>{{ $article->excerpt }}</p>
</li>
#endforeach
}
}
</ul>
This is my controller
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\Article;
class ArticlesController extends Controller
{
public function index()
{
$articles = App/Article::latest()->get();
//$articles = Review::all();
//$article = Review::all();
return view('articles.index',['articles'=>$articles]);
//return view('articles.index', ['articles' => $articles]);
}
public function show($id)
{
$article = App/Article::find($id);
//return view('articles.show', ['article' => $article]);
return view('articles.show')->with('article');
}
public function create()
{
return view('articles.create');
}
public function store()
{
//validation
//clean up
$article = new Article();
$article->title = request('title');
$article->excerpt = request('excerpt');
$article->body = request('body');
$article->save();
return redirect('/articles');
}
public function edit()
{
return view('articles.edit');
}
}
This is the section of my routes file web.php
Route::group(['middleware' => ['web']], function ()
{
Route::get('/about', function () {
$article = App\Article::latest()->get();
return view('about', compact('about', 'articles'));
//return $article;
});
}
I have changed the section of the routes file to the following but it did not seem to work.
return view('about')->with(['article'=> $article]);
I have made sure the following was in my app/Http/Kernel.php in middlewareGroups property for web
\Illuminate\View\Middleware\ShareErrorsFromSession::class,
I have changed the foreach loop to an each loop and I get the same error on the line:
<h3>{{article->title}}</h3>
Let me know if I should post more code.

Answer 1

In your routes:
Route::get('/about', function () {
$articles = App\Article::latest()->get();
return view('about', compact('about', 'articles'));
});
It will return a collection, you can just loop it:
<ul>
#foreach ($articles as $article)
<li class = "first">
<h3>{{ $article->title}}</h3>
<p>{{ $article->excerpt }}</p>
</li>
#endforeach
</ul>

Answer 2

Update your view
<? if (is_array($articles) || is_object($articles)) ?>
{
#foreach($articles as $article)
<li class = "first">
<h3>{{ $article->title}}</h3>
<p>{{ $article->excerpt }}</p>
</li>
#endforeach
}
</ul>
the error is in you foreach loop: https://www.php.net/manual/en/control-structures.foreach.php