did not get output with layout page in laravel - php

I am new to laravel framework, want to use laravel layout master pages, and used to include child pages in master page. here is my header and footer page and app.blade.php is my master page, where i am using #yield to show data. but it did not work for me. my output is showing blank.
app.blade.php (Layout master page)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<title>Master Page</title>
</head>
<body>
<div>
<div>
#yield('header')
</div>
<div class="content">
#section('content')
<h1> Body </h1>
#endsection
</div>
<div>
#yield('footer')
</div>
</div>
</body>
</html>
Header.blade.php
#extends('app')
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title></title>
<style>
.header
{
height:100px;
width:100%;
background-color: aquamarine;
}
</style>
</head>
<body>
<div class="header">
#section('header')
<center> Layout Header Master page </center>
#show
</div>
</body>
</html>
footer.blade.php
#extends('app')
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.footer
{
height:100px;
width:100%;
background-color: aquamarine;
padding-top: 50px ;
}
</style>
</head>
<body>
<div class="footer">
#section('footer')
<center> Layout Footer Master page </center>
#show
</div>
</body>
</html>
web.php (Route)
Route::get('/masterpage','studentcontroller#viewmasterpage')->name('masterpage');
studentcontroller.php
public function viewmasterpage()
{
return view('layouts/app');
}

Problems:
There are some problems in your blades.
Every opening #section Tag needs a closing #endsection Tag.
The section Tags should everything that you want to display in between.
You don't need to add the whole <html> etc. you can simply add the necessary code
I think the content should be a yield because you might want to insert the content of other pages there..
I also think you are confusing #includeand #yield
If you want to outsource your header and footer you can simply #include('yourFolder/footer') and it inserts the code
Solution:
Change the #yield to #include
Change the #section to #yield('content')
Examples:
File named: header.blade.php
<div class="header">
<center> Layout Header Master page </center>
</div>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<title>Master Page</title>
</head>
<body>
<div>
#include('header')
<div class="content">
#yield('content')
</div>
#include('footer')
</div>
</body>
</html>
afterwards you can create a new view: example.blade.php
#extends('layout.app')
#section('content')
//put your content here
#endsection

You are misunderstanding the #extends, #yield and #section directives.
#extends uses another blade file, and fills in the #yield directives with the #sections it defines.
Say you have app.blade.php
<html>
<body>
#yield('header')
#yield('content')
#yield('footer')
</body>
</html>
You could then have say landing.blade.php
#extends('app')
#section('header')
<header>I am the header for the landing page!</header>
#endsection
#section('content')
<div>I am the content for the landing page!</div>
#endsection
#section('footer')
<header>I am the footer for the landing page!</footer>
#endsection

header.blade.php (Just use the code remove others)
#section('header')
<center> Layout Header Master page </center>
#endsection
footer.blade.php (Just use the code remove others)
#section('footer')
<center> Layout Footer Master page </center>
#endsection
app.blade.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<title>Master Page</title>
</head>
<body>
<div>
<div class="header">
#include('header')
</div>
<div class="content">
#yield('content')
</div>
<div class="footer">
#include('footer')
</div>
</div>
</body>
</html>
studentcontroller.php
public function viewmasterpage()
{
return view('layouts.app');
}

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<div class="container">'
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EDIT
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...
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<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js">
</script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
</head>
you need a layout blade blank.blade.php (folder resources\views\layouts) with
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<head>
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then you need your style .css with all the css on inside public folder
then on your .blade.php
#extends('layouts.blank')
#section('main_container')
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Moving ../main.css to ../css/main.css did the trick, I don't why still kinda work before when It shouldn't...
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Laravel blade not showing content

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<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
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<link href="https://fonts.googleapis.com/css?family=Lato:100,200,300,400" rel="stylesheet" type="text/css">
<link href='https://fonts.googleapis.com/css?family=Roboto:400,500,700' rel='stylesheet' type='text/css'>
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<link href="/css/bulma.css" rel='stylesheet' type='text/css'>
<link href="/css/all.css" rel='stylesheet' type='text/css'>
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<body>
<div id="app">
#include('shared.menu.menu')
#yield('content')
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<script src="/js/app.js"></script>
</body>
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This is my login.blade.php:
#extends('index')
#section('content')
#yield('shared.bar.bar')
#stop
So the navigation bar is showing at this point. But the bar is not! When I replace: #yield('shared.bar.bar') with test, test shows up. This is shared/bar/bar.blade.php:
#section('bar')
<section class="hero is-primary">
<div class="hero-body">
<div class="container">
<h1 class="title">
test
</h1>
<h2 class="subtitle">
test
</h2>
</div>
</div>
</section>
#stop
What am I doing wrong? Is it also possible to pass variables to the bar? So I can show another title and subtitle on every page?
--EDIT--
#section('bar')
<section class="hero is-primary">
<div class="hero-body">
<div class="container">
<h1 class="title">
{{ $title }}
</h1>
<h2 class="subtitle">
{{ $subtitle }}
</h2>
</div>
</div>
</section>
#stop
If you are showing all of your code, looks like your yield is
#yield('shared.bar.bar')
And yout section
#section('bar')
When it should be
#section('shared.bar.bar')
Or you should change your yield to
#yield('bar')
Because #yield and #section are only strings, they are not related to files like #include.
And looks like this file is also wrong:
#extends('index')
#section('content')
#yield('shared.bar.bar')
#stop
#yield is something you should start using only in your main layout file, because it can get messy and hard and harder to undestand what's happening. So, unless you have a section 'shared.bar.bar' to fill this #yield, you should probably do something like
#extends('index')
#section('content')
<form>
.... your login form
</form>
#stop
or
#extends('index')
#section('content')
#include('shared.bar.bar')
#stop
or
#extends('index')
#section('content')
#include('shared.bar.bar')
<form>
.... your login form
</form>
#stop
To have the title changed via section you can also do:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="en">
<head>
<title>#yield('title')</title>
</head>
or
<h1 class="title">
#yield('title')
</h1>
And your login blade file, you can do
#extends('index')
// This will tell the Blade Compiler to replace every
// occurence of #yield('title')
#section('title')
User Login
#stop
#section('content')
#include('shared.bar.bar')
<form>
.... your login form
</form>
#stop

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