Check if a section is defined in a view

Question

Using Laravel, how can I modify my layout depending on whether a specific section is defined in a view?

I know I can have some default text display if the section does not exist, but imagine the following scenario:

<div class="row">  
     <div class="col-sm-9"> 
         @yield('content')
     </div>
     <div class="col-sm-3">
         @section('sidebar')
         @show
     </div>
</div>

So if my view defines the @section 'sidebar', this works great. But if the view doesn't define a sidebar, I don't want my main content column to be col-sm-9, I want it to be col-sm-12. I was hoping I could do something like this:

@if(@section('sidebar'))
    <div class="row">  
        <div class="col-sm-9"> 
            @yield('content')
        </div>
        <div class="col-sm-3">
            @section('sidebar')
            @show
        </div>
    </div>
@else
    <div class="row">  
        <div class="col-sm-12"> 
            @yield('content')
        </div>
    </div>
@endif

However that doesn't seem to work. Can anyone suggest an alternative?

thanks!

Answer 1

You can use this to tell if a section is defined or not :

@if (!empty($__env->yieldContent('sidebar')))
   //It is defined
@endif

$__env->yieldContent() returns the content of the specified section, or an empty string if it is not defined or empty.

Edit

Prior to PHP 5.5 empty() will not work on the result of a function directly, so you can use trim() instead, like so :

@if (trim($__env->yieldContent('sidebar')))
   //It is defined
@endif

Answer 2

Laravel 5.2 added a @hasSection directive that does exactly what you're asking. It's not mentioned in 5.3 or 5.4 docs for some reason.

@hasSection('title')
    <title>@yield('title') - {{ config('app.name') }}</title>
@else
    <title>{{ config('app.name') }}</title>
@endif