Backend DevelopmentPHP TutorialLaravel 5 framework learning Blade introduction, laravelblade_PHP tutorial
Laravel 5 Framework Learning - Blade Introduction, laravelblade
In multiple pages we may include the same content, such as file headers, linked css or js, etc. We can use layout files to accomplish this function.
Let’s create a new layout file, such as views/layout.blade.php
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<body>
<div class="container">
@yield('content')
</div>
</body>
</html>
We created an incomprehensible structure and introduced bootstrap. Note that @yield is the layout placeholder of blade. Our page content will be filled here in the future. Modify about.blade.php
@extends('layout')
@section('content')
<h1 id="About-first-last">About {{ $first }} {{ $last }}</h1>
@stop
The above code means that we use the layout file layout.blade.php, and then add content in the content section.
Add in routes.php:
Route::get('about', 'PagesController@about');
Route::get('contact', 'PagesController@contact');
In PagesController.php add:
public function contact() {
return view('pages.contact');
}
New view pages/contact.blade.php
@extends('layout')
@section('content')
<h1 id="Contact-Me">Contact Me!</h1>
@stop
Check it out!
We can add multiple @yields in the layout file, such as adding @yield('footer') in layout.blade.php:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<body>
<div class="container">
@yield('content')
</div>
@yield('footer')
</body>
</html>
For example, if there is a script in contact.blade.php, it can be placed in this section.
@extends('layout')
@section('content')
<h1 id="Contact-Me">Contact Me!</h1>
@stop
@section('footer')
<script>
alert('Contact from scritp')
</script>
@stop
There will be a dialog box when accessing contact, but about is still displayed normally
Use @if for judgment
@extends('layout')
@section('content')
@if ($first = 'Zhang')
<h1 id="Hello-Zhang">Hello, Zhang</h1>
@else
<h1 id="Hello-nobody">Hello, nobody</h1>
@endif
@stop
Can also be regarded as @unless equivalent to if !, and @foreach, etc.
public function about()
{
$people = [
'zhang san',
'li si',
'wang wu'
];
return view('pages.about', compact('people'));
}
@extends('layout')
@section('content')
<h1 id="Person">Person:</h1>
<ul>
@foreach($people as $person)
<li>{{ $person }}</li>
@endforeach
</ul>
@stop
In one case, the data may come from the database and the collection may be empty, like this:
Copy code The code is as follows:
$people = [];
To handle this situation, please add @if handler
@extends('layout')
@section('content')
@if (count($people))
<h1 id="Person">Person:</h1>
<ul>
@foreach($people as $person)
<li>{{ $person }}</li>
@endforeach
</ul>
@endif
<h2 id="Other-info">Other info</h2>
@stop
That's better.
The above is the entire content of this article. I hope it will be helpful to everyone learning Laravel5.
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