laravel date_format() 期望参数 1 为 DateTimeInterface，给定 null（视图：/home/vagrant/code/blog/resources/views/singlePost.blade.php）
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date_format() expects parameter 1 to be DateTimeInterface, null given (View: /home/vagrant/code/blog/resources/views/singlePost.blade.php)
提问by mariona zahra
I cant find whats wrong with my code. I have tried looking at the whole code but I can't put my finger on it. It would be really helpful if someone pointed out my mistake. It is saying that something is wrong with the date but I cant see what I typed wrong.
我找不到我的代码有什么问题。我曾尝试查看整个代码，但我无法理解。如果有人指出我的错误，那将非常有帮助。它说日期有问题，但我看不到我输入的错误。
@extends('layouts.master')
@section('content')
<!-- Page Header -->
<header class="masthead" style="background-image: url('{{asset('assets/img/post-bg.jpg')}}')">
<div class="overlay"></div>
<div class="container">
<div class="row">
<div class="col-lg-8 col-md-10 mx-auto">
<div class="post-heading">
<h1>{{$post->title}}</h1>
<span class="meta">Posted by
<a href="#">{{$post->user->name}}</a>
on {{date_format($post->created_at,'F d,Y')}}</span>
</div>
</div>
</div>
</div>
</header>
<!-- Post Content -->
<article>
<div class="container">
<div class="row">
<div class="col-lg-8 col-md-10 mx-auto">
{!!nl2br($post->content)!!}
</div>
</div>
<div class="comments">
<hr>
<h2>Comments</h2>
<hr>
@foreach($post->comments as $comment)
<p>{{$comment->content}} <br>
<p><small>by {{$comment->user->name}}, on {{date_format($comment->created_at,'F d,Y')}}</small></p>
<hr>
@endforeach
@if(Auth::check())
<form action="{{route('newComment')}}" method="POST">
@csrf
<div class="form-group">
<textarea class="form-control" placeholder="Comment..." name="comment" id="" cols="30" rows="4"></textarea>
<input type="hidden" name="post" value="{{$post->id}}">
</div>
<div class="form-group">
<button class ="btn btn-primary" type="submit">Make Comment</button>
</div>
</form>
@endif
</div>
</article>
@endsection
comments.blade.php code
回答by Niklesh Raut
Error show you must have DateTimeobject
错误显示您必须有DateTime对象
$created_at = new DateTime("2018-02-01");
echo date_format($created_at,'F d,Y');
If you have just date like 2018-02-01Then you can use simple date()function
如果你只有日期，2018-02-01那么你可以使用简单的date()功能
$created_at = "2018-02-01";
echo date('F d,Y',strtotime($created_at));
You can also do it by
你也可以通过
echo (new DateTime("2018-02-01"))->format('F d,Y');
