英文:
Displaying a default picture when the picture of the profile does not exist using file_exists php
问题
我有一个原生的 PHP 应用程序，我正在尝试升级并使用 Laravel 框架。在用户仪表板页面上，有一个根据用户ID（empid）从图片目录中获取的个人资料图片。如果用户没有个人资料图片，会显示默认图片。我以前在原生的 PHP 中使用 file_exists 方法来实现这个功能。但是我不确定为什么在 Laravel 中它现在不起作用了。
以下是我的代码：
@if (file_exists(URL::asset('assets/img/faces/'.Auth::user()->empid.'.jpeg')))
<img alt="user-img" class="avatar avatar-xl brround" src="{{ URL::asset('assets/img/faces/'.Auth::user()->empid.'.jpeg') }}">
@else
<img alt="user-img" class="avatar avatar-xl brround" src="{{ URL::asset('assets/img/faces/default.jpeg') }}">
@endif
这段代码没有进入 if 语句块，每次都执行 else 语句块。
英文:
I have an application in native php, and I am trying to upgrade it and use laravel framework. In the user dashboard page, there is a profile picture that is brought from the pictures directory based on the user ID (empid). If the user does not have a profile picture, there is a default picture that is displayed. I used to do it in native php using file_exists method. But I am not sure why it is not working now with laravel.
Here is my code
@if (file_exists(URL::asset('assets/img/faces/'.Auth::user()->empid.'.jpeg')))
<img alt="user-img" class="avatar avatar-xl brround" src="{{ URL::asset('assets/img/faces/'.Auth::user()->empid.'.jpeg') }}">
@else
<img alt="user-img" class="avatar avatar-xl brround" src="{{ URL::asset('assets/img/faces/default.jpeg') }}">
@endif
The code does not enter the if block; all the time the else block is evaluated.
答案1
得分: 3
你犯的错误是将URL传递给file_exists，因为URL::asset返回的是完整的URL而不是文件路径，所以你需要稍微调整一下，像这样：
$path = 'assets/img/faces/' . Auth::user()->empid . '.jpeg';
file_exists(public_path($path))
如果你将逻辑提取到一个函数中并返回一个头像，你的Blade代码可以简化，我会将它放在你的User模型中。
// User.php
/**
* 如果存在，获取用户的头像，否则获取默认头像。
* @return string
*/
public function getAvatar()
{
$path = 'assets/img/faces/' . Auth::user()->empid . '.jpeg';
if (file_exists(public_path($path))) {
return asset($path);
}
return asset('assets/img/faces/default.jpeg');
}
然后在你的Blade模板中，移除@if @else块，并用以下简化的代码替换：
<img alt="user-img" class="avatar avatar-xl brround" src="{{ Auth::user()->getAvatar() }}">
英文:
The mistake you're doing is passing a URL to file_exists because URL::asset returns a full url not a file path so you need to tweak a little bit something like this
$path = 'assets/img/faces/'.Auth::user()->empid.'.jpeg'
file_exists(public_path($path))
Your blade code can be simplified if you extracted the logic to a function that returns an avatar, I would place it in your User model.
// User.php
/**
* Get the user's avatar if it exists otherwise gets a default avatar.
* @return string
*/
public function getAvatar()
{
$path = 'assets/img/faces/' . Auth::user()->empid . '.jpeg';
if (file_exists(public_path($path))) {
return asset($path);
}
return asset('assets/img/faces/default.jpeg');
}
Then in your blade remove the @if @else block and replace it with this simplified
<img alt="user-img" class="avatar avatar-xl brround" src="{{ Auth::user()->getAvatar() }}">
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