All You Need To Know About Blade Templates In Laravel

Let's start with the introduction of Blade and how Laravel supports it strongly.

Laravel provides a simple and powerful templating engine like as blade. You can also use PHP code in blade template views. In fact, all blade views are compiled into plain PHP code. Blade view files use the “ .blade.php “ extension and it stored in “ resources/views “ directory.
 
Template Inheritance:
 
When defining a view you use the Blade @extends directive to extend the blade layout and blade all section using @section directives. 

@extends('layouts.app')
 
@section('title', 'Page sidebar')
 
@section('sidebarDemo')
@parent
 
<p>This is sidebar demo.</p>
@endsection
 
@section('content')
<p>This is body content.</p>
@endsection

Here, we are extending layouts.app blade view so we use all section @section directives @parent directive is an append directive to the layout’s sidebar
 
Blade view may be returned from routes.

Route::get(blade/name, function () {
    return view('blade.name');
});

Displaying Data:- 

You may Display data in blade bypass the variable in curly braces like:

 Route::get('bladeDemo', function () {
        return view('welcome', ['name' => 'Addweb']);
});

Here, we add the ‘Data’ in name variable so, we display the name like,

 Hello {{ $name }}.

It has not limited to displaying content, in fact, you can also put any PHP code and result of any PHP functions inside of blade echo statement.

{{ isset($name) ? $name : Test }}

Here, we use the ternary operator to check the name is exist or not. if a name exists and set so it displays name and not set name so it can display Default.
 
Control Structures:-
 
The blade provides the displaying data but in additionally blade also provides the convenient shortcut of PHP control structure such as conditional statement and loops.  
 
    If statement:-
    
You may use the @if, @elseif, @else, @endif directives for the if construct.These directives function identically to their PHP counterparts.

@if (count($records) === 1)
    I have one record!
@elseif (count($records) > 1)
    I have multiple records!
@else
    I don't have any records!
@endif    

Loops:-
    
Blade provides simple directive parts for a looping and it is identical to their PHP counterparts

@for ($i = 0; $i < 10; $i++)
        The current value is {{ $i }}
@endfor
 
@foreach ($demos as $demo)
    <p>This is demo{{ $demo->id }}</p>
@endforeach
 
@forelse ($demos as $demo)
    <li>{{ $demo->name }}</li>
@empty
    <p>No users</p>
@endforelse
 
@while (true)
    <p>I'm looping forever.</p>
@endwhile

The Loop variables:-
 
When a loop is working a $loop is available inside of a loop. This variable provides some variable to use bits of information such as the current loop of an index and first or last iteration of a loop.

@foreach ($demos as $demo)
@if ($loop->first)
        This is the first iteration.
    @endif
 
    @if ($loop->last)
        This is the last iteration.
    @endif
 
    <p>This is user {{ $demo->id }}</p>
@endforeach

Here, $loop is an access parent’s variable and via the parent property
 
The $loop variable have also some other variety of other useful properties like,
 
$loop->index - This property display current iteration of loop
$loop->first    - This property display first iteration through the loop
$loop->last    - This property display last iteration through the loop
$loop->count - This property display total number of item 
$loop->iteration - The current loop iteration
$loop->remaining - The iteration remaining in the loop
$loop->depth - The nesting level of current loop
$loop->parent - when a nested loop, the parent’s loop variable 
 
Extending Blade:-
 
The blade has some own custom directives and its use directive method. When Blade compiles own custom directives it will call the provided callback with expression.