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Blade

Introduction

The Blade template engine is bundled with the illuminate/view package. When working with the Themosis framework, you automatically get access to it in order to work out your views.

Basic usage

In order to use the Blade engine, all your view files should use the .blade.php extension.

Previous versions of the Themosis framework used a fork of the Blade engine called Scout. It is now deprecated to use it. For backward compatibility, views using the .scout.php file extension are now compiled through the Blade engine. But you'll need to update view statements as {{ }} double curly braces now escape data causing some layout issues during upgrade.

Here is an example of a basic view, using Blade, stored inside the resources/views folder:

<!-- View stored in resources/views/welcome.blade.php -->
@extends('layouts.main')

@section('main')
    <h1>Hello, {{ $name }}</h1>
@endsection

@section('sidebar')
    <h3>Latest posts</h3>
    <ul>
        @foreach($items as $item)
            <li>{{ $item->post_title }}</li>
        @endforeach
    </ul>
@endsection

And this view may be returned to the browser like so:

Route::get('home', function ($post, $query) {
    $posts = $query->get_posts();
    return view('welcome', ['name' => 'Julien', 'items' => $posts]);
});

In the previous example, we used the @extends syntax. This function allows you to use layouts:

<!-- Layout stored in resources/views/layouts/main.blade.php -->
@include('header')
    <div class="container">
        @yield('main')
    </div>

    <div class="sidebar">
        @section('sidebar')	
            <p>Sidebar section from the "main" layout file.</p>
        @show
    </div>
@include('footer')

Blade control structures

Include views

@include('header')

This command can include a view file called header.php or header.blade.php.

Pass data to included views

@include('header', ['title' => 'Documentation'])

Sections

Overwrite section

Add the @section and @endsection statements to overwrite a layout section.

@extends('layouts.main')

@section('sidebar')
    <p>New sidebar content</p>
@endsection

Extend parent section

Add the @parent statement in order to keep the content of the parent section defined in the layout view.

@extends('layouts.main')

@section('sidebar')
    @parent
    <p>Child sidebar content appended to parent's content</p>
@endsection

Echo data

Hello {{ $name }}

By default the double curly braces echo the data and escape it.

Echo unescaped data

Hello {!! $name !!}

This is useful when you need to display HTML data like for example a post content.

Echoing data after checking for existence

By default you could write the following statement:

{{ isset($name) ? $name : 'Default' }}

Instead of writing a ternary statement, Blade allows you to use the following convenient short-cut:

{{ $name or 'Default' }}

Conditional statements

If

@if(isset($value))
    <p>The value is {{ $value }}.</p>
@elseif(is_array($value))
    <p>The value is an array.</p>
@else
    <p>Something is wrong, there is no value.</p>
@endif

Unless

Sometimes it is more readable to use @unless syntax instead of @if.

@unless(User::current()->can('edit_posts'))
    <p>No editing permission.</p>
@endunless

The above is the same as:

@if(!User::current()->can('edit_posts'))
    <p>No editing permission.</p>
@endif

Loop statements

For

<ul>
    @for($i = 0; $i < 10; $i++)
        <li>Item {{ $i }}</li>
    @endfor
</ul>

While

@while(true)
    <p>Show it!</p>
@endwhile

Foreach

@foreach($items as $key => $value)
    <p>This {{ $value }} opens that {{ $key }}.</p>
@endforeach

Check the official documentation for information about the $loop variable.

Displaying raw text

If you need to display a string that is wrapped in curly braces, you may escape the Blade behavior by prefixing your text with an @ symbol:

@{{ This is not processed by Scout }}

Check also the verbatim directive for larger text.

Comments

{{-- This comment will not be rendered in HTML --}}

Extending Blade

Blade allows you to add new compiler statements, called directives by using the directive() method. The Themosis framework already extends Blade but do not provide a "facade" to access it like in the official documentation.

In order to get the Blade compiler instance, use the following code:

$blade = container('view')->getEngineResolver()->resolve('blade')->getCompiler();

We recommend you to register directives from a service provider. Check the Service provider guide for more information.

Here is an example in order to add a simple directive @menu() that works as a shortcut to the WordPress function wp_nav_menu().

$blade = container('view')->getEngineResolver()->resolve('blade')->getCompiler();

$blade->directive('menu', function ($expression) {
    return '<?php wp_nav_menu('.$expression.'); ?>';
});

Themosis directives

The Themosis framework provides extra directives to help you work with WordPress templates.

@loop

The @loop directive gives you a shortcut to handle the WordPress loop.

In place of typing these statements:

<?php
if (have_posts()) {
    while (have_posts()) {
        the_post();
?>
        <h1><?php the_title(); ?></h1>
        <div>
            <?php the_content(); ?>
        </div>
<?php
    }
}

Simply write this code into your view:

@loop
    <h1>{{ Loop::title() }}</h1>
    <div>
        {{ Loop::content() }}
    </div>
@endloop

@query

The @query directive provides a shortcut to run custom WordPress loops:

@query(['post_type' => 'post', 'posts_per_page' => 3])
    <h1>{{ Loop::title() }}</h1>
    <div>
        {{ Loop::content() }}
    </div>
@endquery

The array you pass inside the @query statement is equivalent to the one you pass when using the WP_Query class. Check the WordPress codex to customize your loop query. You can also pass the WP_Query instance to the @query statement.

The Loop class used in the examples is a core class to be used only inside the WordPress loop. More informations below.

@wp_head

The @wp_head directive is a shortcut for `:

<head>
    @wp_head
</head>
<body>

@wp_footer

The @wp_footer directive is a shortcut for <?php wp_footer(); ?>

    @wp_footer
</body>

Loop helper

The Loop helper class provides methods with a simple syntax in order to call WordPress loop functions.

Here is a list of the available methods.

This class only works inside WordPress loop statements. The Loop class methods always return a result, so use echo statements to output their content.

Get the ID of current post

@loop
    $id = Loop::id();
@endloop

Get the title of current post

@loop
    <h1>{{ Loop::title() }}</h1>
@endloop

Get the author

@loop
    <em>{{ Loop::author() }}</em>
@endloop

Get author meta

@loop
    <em>{{ Loop::authorMeta('email') }}</em>
@endloop

Get the content of current post

@loop
    <article>{{ Loop::content() }}</article>
@endloop

Get the excerpt of current post

@loop
    <aside>{{ Loop::excerpt() }}</aside>
@endloop

Get the thumbnail of current post

This method accepts two arguments:

  • $size: string|array The size of the thumbnail
  • $attr: string|array The img tag attributes
@loop
    {{ Loop::thumbnail('thumbnail') }}
@endloop

Get the thumbnail URL

You can also pass a $size value (string or array) and $icon boolean value as arguments:

@loop
    <img src="{{ Loop::thumbnailUrl('thumbnail') }}">
@endloop

Get the permalink of current post

@loop
    <a href="{{ Loop::link() }}">Read more</a>
@endloop

Get the categories of current post

@loop
    <ul>
        @foreach(Loop::category() as $cat)
            <li>{{ $cat->name }}</li>
        @endforeach
    </ul>
@endloop

Get the tags of current post

@loop
    <ul>
        @foreach(Loop::tags() as $tag)
            <li>{{ $tag->name }}</li>
        @endforeach
    </ul>
@endloop

Get the custom taxonomy terms of current post

Pass the custom taxonomy slug as first argument.

  • $taxonomy: string The taxonomy slug.
@loop
    <ul>
        @foreach(Loop::terms('custom-slug') as $term)
            <li>{{ $term->name }}</li>
        @endforeach
    </ul>
@endloop

Get the date

You can pass a date format string as an argument as well.

@loop
    <time>{{ Loop::date() }}</time>
@endloop

Display the class attribute of the current post

The Loop::postClass() method returns the HTML class attribute with WordPress generated class terms. You also have the opportunity to add one or more custom classes to the current post or a defined post.

Loop::postClass($class = '', $post_id = null):

  • $class: string|array One or more classes to add.
  • $post_id: int|WP_Post Given post ID or post object.

Output the post classes:

@loop
    <article {{ Loop::postClass() }}>
        <h2>Title</h2>
    </article>
@endloop

Here is an example of the rendered HTML code with the class attribute:

<article class="post-4 post type-post status-publish hentry">
    <h2>Title</h2>
</article>

Note that this function is heavy and may slow your pages if used during the output of a list of posts.

Display next post link

@loop
    {!! Loop::nextPage() !!}
@endloop

Display previous post link

@loop
    {!! Loop::previousPage() !!}
@endloop

Display archive pagination

@loop
    {!! Loop::paginate() !!}
@endloop

Poedit

By default, Poedit cannot find strings to translate from Blade templates. Here is a list of parameters to add to your Poedit software preferences so it can detect translation strings from your Blade views:

  1. Open Poedit
  2. Go to Preferences -> Parsers
  3. Add a new parser with following settings:
    • Language: Blade
    • Extension: *.scout.php, *.blade.php
    • Parser command: xgettext --language=Python --add-comments=TRANSLATORS --force-po -o %o %C %K %F
    • An item in keyword list: -k%k
    • An item in input files list: %f
    • Source code charset: --from-code=%c
  4. Click save

In order for this to work, you must have a poedit project correctly setup pointing to the languages folder of either your theme or custom plugin and define the gettext methods and resources base path. From the catalog preferences, set the sources paths like so:

  • Base path: ../
  • Paths:
    • resources
    • resources/admin
    • resources/views

as well as adding the following gettext methods to the source keywords catalog tab:

  • __
  • _e
  • _x
  • esc_html__
  • esc_html_e
  • _n
  • _nx
  • _n_noop
  • _nx_noop
  • _ex

and more if needed.

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