Laravel - Check if @yield empty or not

Is it possible to check into a blade view if @yield have content or not?

I am trying to assign the page titles in the views:

@section("title", "hi world")

So I would like to check in the main layout view... something like:

<title> Sitename.com {{ @yield('title') ? ' - '.@yield('title') : '' }} </title>

There is probably a prettier way to do this. But this does the trick.

@if (trim($__env->yieldContent('title')))
    <h1>@yield('title')</h1>
@endif

In Laravel 5 we now have a hasSection method we can call on a View facade.

You can use View::hasSection to check if @yeild is empty or not:

<title>
    @if(View::hasSection('title'))
        @yield('title')
    @else
        Static Website Title Here
    @endif
</title>

This conditional is checking if a section with the name of title was set in our view.

Tip: I see a lot of new artisans set up their title sections like this:

@section('title')
Your Title Here
@stop

but you can simplify this by just passing in a default value as the second argument:

@section('title', 'Your Title Here')

The hasSectionmethod was added April 15, 2015.

For those looking on it now (2018+), you can use :

@hasSection('name')
   @yield('name')
@endif

See : https://laravel.com/docs/5.6/blade#control-structures

Given from the docs:

@yield('section', 'Default Content');

Type in your main layout e.g. "app.blade.php", "main.blade.php", or "master.blade.php"

<title>{{ config('app.name') }} - @yield('title', 'Otherwise, DEFAULT here')</title>

And in the specific view page (blade file) type as follows:

@section('title')
My custom title for a specific page
@endsection

You can simply check if the section exists:

if (isset($__env->getSections()['title'])) {

    @yield('title');
}

And you can even go a step further and pack this little piece of code into a Blade extension: http://laravel.com/docs/templates#extending-blade

@if (View::hasSection('my_section'))
    <!--Do something-->
@endif

why not pass the title as a variable View::make('home')->with('title', 'Your Title') this will make your title available in $title

I don't think you can, but you have options, like using a view composer to always provide a $title to your views:

View::composer('*', function($view)
{
    $title = Config::get('app.title');

    $view->with('title', $title ? " - $title" : '');
});

Can you not do:

layout.blade.php

<title> Sitename.com @section("title") Default @show </title>

And in subtemplate.blade.php:

@extends("layout")

@section("title") My new title @stop

The way to check is to not use the shortcut '@' but to use the long form: Section.

<?php
  $title = Section::yield('title');
  if(empty($title))
  {
    $title = 'EMPTY';
  }

  echo '<h1>' . $title . '</h1>';
?>

Building on Collin Jame's answer, if it is not obvious, I would recommend something like this:

<title>
  {{ Config::get('site.title') }} 
  @if (trim($__env->yieldContent('title')))
    - @yield('title')
  @endif
</title>

Sometimes you have an enclosing code, which you only want to have included in that section is not empty. For this problem I just found this solution:

@if (filled(View::yieldContent('sub-title')))
    <h2>@yield('sub-title')</h2>
@endif

The title H2 gets only displayed it the section really contains any value. Otherwise it won't be printed...

来源：https://stackoverflow.com/questions/20412738/laravel-check-if-yield-empty-or-not

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