Chapters

31 Chapters | 3:19:40 |

01

Hello Symfony Mailer

4:32
02

Creating, Configuring & Sending the Email Object

4:14
03

Transport Config & Mailtrap

5:43
04

HTML Emails with Twig

5:44
05

Absolute URLs to Routes & Assets

5:26
06

Email Context & the Magic "email" Variable

7:30
07

Pretty Text Emails

2:08
08

Embedded Images

7:40
09

Automatic CSS Inlining

5:38
10

Inlining CSS Files

4:07
11

Ink: Automatic CSS Email Framework

10:09
12

Let's Make a Console Command!

7:51
13

Using a Base Email Template

8:54
14

Router Request Context: Fix Paths in the CLI

6:02
15

PDF: Snappy, wkhtmltopdf & Template Setup

6:42
16

Lets Generate a PDF!

4:56
17

Styling PDFs with CSS

5:34
18

Organizing Emails Logic into a Service

6:22
19

Unit Testing our Emails

7:56
20

Integration Testing Emails

8:50
21

Functional Testing with Emails

7:52
22

Email Delivery & Assertions in Tests

6:03
23

SendGrid & All About Transports

6:35
24

Production Settings with SendGrid

6:51
25

Sender Authentication: SPF & DKIM

7:56
26

Events & Overriding "Recipients"

8:12
27

Setting "From" Globally

6:39
28

Async Emails with Messenger

6:11
29

Attachments with Async Messenger Emails

3:57
30

Styling Emails with Encore & Sass Part 1

6:02
31

Processing Encore Files through inline_css()

7:27

> Symfony 5 > Symfony Mailer: Love Sending Emails Again

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13.

Using a Base Email Template

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We found all the authors that want to receive an update about the articles they wrote during the last 7 days. Now, let's send them that update as an email.

If you downloaded the course code, you should have a tutorial/ directory with an inky/ directory and a file inside called author-weekly-report.html.twig. Copy that and throw it into templates/email/.

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            templates/email/author-weekly-report.html.twig
        
                Show Lines

                                                    // ... line 1
                            
                <container>
        
                    {# Header #}
        
                    <hr>
        
                    <spacer size="20"></spacer>
        
                    <row>
        
                        <columns>
        
                            <p>
        
                                What a week {{ email.toName }}! Here's a quick review of what you've been up to on the Space Bar this week
        
                            </p>
        
                        </columns>
        
                    </row>
        
                    <row>
        
                        <columns>
        
                            <table>
        
                                <tr>
        
                                    <th>#</th>
        
                                    <th>Title</th>
        
                                    <th>Comments</th>
        
                                </tr>
        
                                <tr>
        
                                    <td>1</td>
        
                                    <td>Article Title</td>
        
                                    <td>99</td>
        
                                </tr>
        
                            </table>
        
                        </columns>
        
                    </row>
        
                    <row>
        
                        <columns>
        
                            <center>
        
                                <spacer size="20"></spacer>
        
                                <button href="{{ url('app_homepage') }}">Check on the Space Bar</button>
        
                                <spacer size="20"></spacer>
        
                            </center>
        
                        </columns>
        
                    </row>
        
                    {# Footer #}
        
                </container>
        
                Show Lines

                                                    // ... lines 40 - 41

Nice! This template is already written using the Inky markup: the markup that Inky will translate into HTML that will work in any email client. But mostly, other than a link to the homepage and the user's name, this is a boring, empty email: we still need to print the core content of the email.

Designing, Configuring & Sending that Email

Let's open up welcome.html.twig, steal the apply line from here, and paste it on top of the new template. This will translate the markup to Inky and inline our CSS. At the bottom, add endapply... and I'll indent everything to satisfy my burning inner need for order in the universe!

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            templates/email/author-weekly-report.html.twig
        
            {% apply inky_to_html|inline_css(source('@styles/foundation-emails.css'), source('@styles/email.css')) %}
        
                <container>
        
                Show Lines

                                                    // ... lines 3 - 38
                            
                </container>
        
            {% endapply %}

To send this email, we know the drill! In the command, start with $email = (new TemplatedEmail()), ->from() and... ah: let's cheat a little.

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            src/Command/AuthorWeeklyReportSendCommand.php
        
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                                                    // ... lines 1 - 6
                            
            use Symfony\Bridge\Twig\Mime\TemplatedEmail;
        
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                                                    // ... lines 8 - 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 53
                            
                        if (count($articles) === 0) {
        
                            continue;
        
                        }
        
                        $email = (new TemplatedEmail())
        
                Show Lines

                                                    // ... lines 59 - 67
                            
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

Go back to src/Controller/SecurityController.php, find the register() method and copy its from() line: we'll probably always send from the same user. And yes, we'll learn how not to duplicate this later. I'll re-type the "S" on NamedAddress and hit tab to add the missing use statement on top.

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            src/Command/AuthorWeeklyReportSendCommand.php
        
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                                                    // ... lines 1 - 14
                            
            use Symfony\Component\Mime\NamedAddress;
        
                Show Lines

                                                    // ... line 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 57
                            
                        $email = (new TemplatedEmail())
        
                            ->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
        
                Show Lines

                                                    // ... lines 60 - 67
                            
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

Tip

In Symfony 4.4 and higher, use new Address() - it works the same way as the old NamedAddress.

Ok, let's finish the rest: ->to() with new NamedAddress() $author->getEmail() and $author->getFirstName(),

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            src/Command/AuthorWeeklyReportSendCommand.php
        
                Show Lines

                                                    // ... lines 1 - 14
                            
            use Symfony\Component\Mime\NamedAddress;
        
                Show Lines

                                                    // ... line 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 57
                            
                        $email = (new TemplatedEmail())
        
                            ->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
        
                            ->to(new NamedAddress($author->getEmail(), $author->getFirstName()))
        
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                                                    // ... lines 61 - 67
                            
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

->subject('Your weekly report on The Space Bar!') and

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            src/Command/AuthorWeeklyReportSendCommand.php
        
                Show Lines

                                                    // ... lines 1 - 14
                            
            use Symfony\Component\Mime\NamedAddress;
        
                Show Lines

                                                    // ... line 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 57
                            
                        $email = (new TemplatedEmail())
        
                            ->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
        
                            ->to(new NamedAddress($author->getEmail(), $author->getFirstName()))
        
                            ->subject('Your weekly report on the Space Bar!')
        
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                                                    // ... lines 62 - 67
                            
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

->htmlTemplate() to render email/author-weekly-report.html.twig.

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            src/Command/AuthorWeeklyReportSendCommand.php
        
                Show Lines

                                                    // ... lines 1 - 14
                            
            use Symfony\Component\Mime\NamedAddress;
        
                Show Lines

                                                    // ... line 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 57
                            
                        $email = (new TemplatedEmail())
        
                            ->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
        
                            ->to(new NamedAddress($author->getEmail(), $author->getFirstName()))
        
                            ->subject('Your weekly report on the Space Bar!')
        
                            ->htmlTemplate('email/author-weekly-report.html.twig')
        
                Show Lines

                                                    // ... lines 63 - 67
                            
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

Do we need to pass any variables to the template? Technically... no: the only variable we're using so far is the built-in email variable. But we will need the articles, so let's call ->context([]). Pass this an author variable... I'm not sure if we'll actually need that... and the $articles that this author recently wrote.

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            src/Command/AuthorWeeklyReportSendCommand.php
        
                Show Lines

                                                    // ... lines 1 - 14
                            
            use Symfony\Component\Mime\NamedAddress;
        
                Show Lines

                                                    // ... line 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 57
                            
                        $email = (new TemplatedEmail())
        
                            ->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
        
                            ->to(new NamedAddress($author->getEmail(), $author->getFirstName()))
        
                            ->subject('Your weekly report on the Space Bar!')
        
                            ->htmlTemplate('email/author-weekly-report.html.twig')
        
                            ->context([
        
                                'author' => $author,
        
                                'articles' => $articles,
        
                            ]);
        
                Show Lines

                                                    // ... line 67
                            
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

Done! Another beautiful Email object. We're a machine! How do we send it? Oh, we know that too: we need the mailer service. Add a third argument to the constructor: MailerInterface $mailer. I'll do our usual Alt+Enter trick and select "Initialize Fields" to create that property and set it.

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            src/Command/AuthorWeeklyReportSendCommand.php
        
                Show Lines

                                                    // ... lines 1 - 13
                            
            use Symfony\Component\Mailer\MailerInterface;
        
                Show Lines

                                                    // ... lines 15 - 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 22
                            
                private $mailer;
        
                public function __construct(UserRepository $userRepository, ArticleRepository $articleRepository, MailerInterface $mailer)
        
                {
        
                Show Lines

                                                    // ... lines 27 - 30
                            
                    $this->mailer = $mailer;
        
                }
        
                Show Lines

                                                    // ... lines 33 - 72
                            
            }

Back down below, give a co-worker a serious "nod"... as if you're about to take on a task of great gravity... but instead, send an email: $this->mailer->send($email).

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            src/Command/AuthorWeeklyReportSendCommand.php
        
                Show Lines

                                                    // ... lines 1 - 16
                            
            class AuthorWeeklyReportSendCommand extends Command
        
            {
        
                Show Lines

                                                    // ... lines 19 - 40
                            
                protected function execute(InputInterface $input, OutputInterface $output)
        
                {
        
                Show Lines

                                                    // ... lines 43 - 47
                            
                    foreach ($authors as $author) {
        
                Show Lines

                                                    // ... lines 49 - 57
                            
                        $email = (new TemplatedEmail())
        
                            ->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
        
                            ->to(new NamedAddress($author->getEmail(), $author->getFirstName()))
        
                            ->subject('Your weekly report on the Space Bar!')
        
                            ->htmlTemplate('email/author-weekly-report.html.twig')
        
                            ->context([
        
                                'author' => $author,
        
                                'articles' => $articles,
        
                            ]);
        
                        $this->mailer->send($email);
        
                    }
        
                Show Lines

                                                    // ... lines 69 - 71
                            
                }
        
            }

Love that. In our fixtures, thanks to some randomness we're using, about 75% of users will be subscribed to the newsletter. Before we run the command, let's make sure the data is fresh... with recent article created dates. Run:

php bin/console doctrine:fixtures:load

This should add enough users and articles that about 1-2 authors will be subscribed to the newsletter and have recent articles. Try that command:

php bin/console app:author-weekly-report:send

Ha! It didn't explode! It found 6 authors... or really, 6 users that are subscribed to the newsletter... but anywhere from 0 to 6 of these might actually have recent articles. Spin over to Mailtrap. If you don't see any emails - try reloading the fixtures again... just in case you got some bad random data, then re-run the command. Oh, and if you got an error when running the command about too many emails being sent, you've hit a limit on Mailtrap. The free plan only allows sending 2 emails each 10 seconds. In that case, ignore the error - because two emails did send - or reload your fixtures to hopefully send less emails.

We have exactly one email: phew! So... we rock! Or do we?

I see a few problems. First, the link to the homepage is broken: it links to localhost. Not localhost:8000 - or whatever our real domain is - just localhost. When you send emails from a console command... your paths break. More on that later.

Base Email Template

The second problem is more obvious... and it's my fault: this email is missing the cool header and footer we had in the other email! Why? Simple: in welcome.html.twig, we have a header with a logo on top and a footer at the bottom. In author-weekly-report.html.twig? I forgot to put that stuff!

Ok, I really did it on purpose: we probably do want a consistent layout for every email... but we definitely do not want to duplicate that layout in every email template.

We know the fix! We do it all the time in normal twig: create a base template, a base email template. In the templates/email directory, add a new file called, how about emailBase.html.twig.

And... I'll close a few files. In welcome.html.twig, copy that entire template and paste in emailBase. Then... select the middle of the template and delete! We basically want the header, the footer and, in the middle, a block for the content. Add {% block content %}{% endblock %}.

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                        32 lines
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            templates/email/emailBase.html.twig
        
            {% apply inky_to_html|inline_css(source('@styles/foundation-emails.css'), source('@styles/email.css')) %}
        
                <container>
        
                    <row class="header">
        
                        <columns>
        
                            <a href="{{ url('app_homepage') }}">
        
                                <img src="{{ email.image('@images/email/logo.png') }}" class="logo" alt="SpaceBar Logo">
        
                            </a>
        
                        </columns>
        
                    </row>
        
                    {% block content %}
        
                    {% endblock %}
        
                    <row class="footer">
        
                        <columns>
        
                            <p>Cheers,</p>
        
                            <p>Your friendly <em>Space Bar Team</em></p>
        
                        </columns>
        
                    </row>
        
                    <row class="bottom">
        
                        <columns>
        
                            <center>
        
                                <spacer size="20"></spacer>
        
                                <div>
        
                                    Sent with ❤️ from the friendly folks at The Space Bar
        
                                </div>
        
                            </center>
        
                        </columns>
        
                    </row>
        
                </container>
        
            {% endapply %}

That block name could be anything. Now that we have this nifty template, back in welcome.html.twig, life gets simpler. On top, start with {% extends 'email/emailBase.html.twig' %}. Then, delete the apply and endapply, and replace it with {% block content %}... and {% endblock %}.

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                        55 lines
            |
            templates/email/welcome.html.twig
        
            {% extends 'email/emailBase.html.twig' %}
        
            {% block content %}
        
                <row class="welcome">
        
                    <columns>
        
                        <spacer size="35"></spacer>
        
                        <h1>
        
                            <center>
        
                                Nice to meet you {{ email.toName }}!
        
                            </center>
        
                        </h1>
        
                        <spacer size="10"></spacer>
        
                    </columns>
        
                </row>
        
                <spacer size="30"></spacer>
        
                <row>
        
                    <columns>
        
                        <p>
        
                            Welcome to <strong>the Space Bar</strong>, we can't wait to read what you have to write.
        
                            Get started on your first article and connect with the space bar community.
        
                        </p>
        
                    </columns>
        
                </row>
        
                <row>
        
                    <columns>
        
                        <center>
        
                            <button href="{{ url('admin_article_new') }}">Get writing!</button>
        
                        </center>
        
                    </columns>
        
                </row>
        
                <row>
        
                    <columns>
        
                        <p>
        
                            Check out our existing articles and share your thoughts in the comments!
        
                        </p>
        
                    </columns>
        
                </row>
        
                <row>
        
                    <columns>
        
                        <center>
        
                            <button href="{{ url('app_homepage') }}">Get reading!</button>
        
                        </center>
        
                    </columns>
        
                </row>
        
                <row>
        
                    <columns>
        
                        <p>
        
                            We're so excited that you've decided to join us in our corner of the universe,
        
                            it's a friendly one with other creative and insightful writers just like you!
        
                            Need help from a friend? We're always just a message away.
        
                        </p>
        
                    </columns>
        
                </row>
        
            {% endblock %}

If you're wondering why we don't need the inky_to_html and inline_css filter stuff anymore, it's because the contents of this template will be put into a block that is inside of those same filters. The content will go through those filters... but we don't need to worry about adding them in every template.

Now we can delete most of the content: all we really need is the welcome row... and down below, we can get rid of the bottom and footer stuff. Celebrate your inner desire for order by un-indenting this.

Perfecto! Repeat this beautiful code in author-weekly-report.html.twig: {% extends 'email/emailBase.html.twig' %}, {% block content %} and all the way at the bottom, {% endblock %}. We can also remove the container element... and unindent.

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            templates/email/author-weekly-report.html.twig
        
            {% extends 'email/emailBase.html.twig' %}
        
            {% block content %}
        
                <hr>
        
                <spacer size="20"></spacer>
        
                <row>
        
                    <columns>
        
                        <p>
        
                            What a week {{ email.toName }}! Here's a quick review of what you've been up to on the Space Bar this week
        
                        </p>
        
                    </columns>
        
                </row>
        
                <row>
        
                    <columns>
        
                        <table>
        
                            <tr>
        
                                <th>#</th>
        
                                <th>Title</th>
        
                                <th>Comments</th>
        
                            </tr>
        
                            <tr>
        
                                <td>1</td>
        
                                <td>Article Title</td>
        
                                <td>99</td>
        
                            </tr>
        
                        </table>
        
                    </columns>
        
                </row>
        
                <row>
        
                    <columns>
        
                        <center>
        
                            <spacer size="20"></spacer>
        
                            <button href="{{ url('app_homepage') }}">Check on the Space Bar</button>
        
                            <spacer size="20"></spacer>
        
                        </center>
        
                    </columns>
        
                </row>
        
            {% endblock %}

That felt great! Let's see how it looks: run our weekly report:

php bin/console app:author-weekly-report:send

And... move back over! Woo! Now every email can easily share the same "look".

Next, let's finish the email by making it dynamic. And, most importantly, let's figure out why our link paths are broken. You need to be extra careful when you send an email from the command line.

9 Comments

Sort By

Thomas Legrand 3 years ago

Nice post !
Thanks for your share !
I did the same before and it's the good way!
See you later :)

Thomas de Smart-Infos

1 | Reply |

Christian W. 3 years ago

Hi @Ryan, shouldn't inky & foundation get us responsive email templates out of the box? i always end up scrolling horizontal on mobile (mailtrap is an awesome helper, thanks!!).. checked out the course project and realized, it's having problems with mobile devices too.. would you mind taking a look into responsive email templates with inky in the course?

| Reply |

AymDev 5 years ago edited

When the command explodes as of Mailtrap free accounts limitations:
<blockquote>Expected response code "354" but got code "550", with message "550 5.7.0 Requested action not taken: too many emails per second".</blockquote>
If you want to make it work regardless of the amount of emails you send you can add sleep(5) at the end of the loop, which makes it slow but working.

| Reply |

Victor SFCASTS AymDev 5 years ago

Hey AymDev,

Thank you for this tip! Yeah, adding a 5 seconds delay should be a workaround. Or just use messenger that will send not more than 1 email each 5 seconds - and this way you even don't need to tweak any code. We cover the integration with Messenger in the end of this course :)

Cheers!

| Reply |

AymDev Victor 5 years ago

I thought about Messenger too :)
Yes I just proposed a lazy workaround but there's better real solutions as you mentioned.

Cheers !

| Reply |

Victor SFCASTS AymDev 5 years ago

Hey AymDev,

Or you can always use their paid plans :p

Cheers!

| Reply |

Gregory 5 years ago

I don't know if it's just for me, but the video is very blurry.
Thanks
Regards
Greg

| Reply |

mr_d Gregory 5 years ago

Yep. No HD version for this video as well. The same applies to "Email Context & the Magic 'email' Variable" video.

| Reply |

sadikoff SFCASTS mr_d 5 years ago

Thanks for reporting! Already fixed!

Cheers!!

| Reply |

This tutorial is built on Symfony 4.3, but will work well with Symfony 4.4 or 5.

Symfony 4.3

What PHP libraries does this tutorial use?

// composer.json
{
    "require": {
        "php": "^7.1.3",
        "ext-iconv": "*",
        "aws/aws-sdk-php": "^3.87", // 3.110.11
        "composer/package-versions-deprecated": "^1.11", // 1.11.99
        "doctrine/annotations": "^1.0", // 1.10.1
        "doctrine/doctrine-bundle": "^1.6.10", // 1.11.2
        "doctrine/doctrine-migrations-bundle": "^1.3|^2.0", // v2.0.0
        "doctrine/orm": "^2.5.11", // v2.7.2
        "knplabs/knp-markdown-bundle": "^1.7", // 1.7.1
        "knplabs/knp-paginator-bundle": "^2.7", // v2.8.0
        "knplabs/knp-snappy-bundle": "^1.6", // v1.6.0
        "knplabs/knp-time-bundle": "^1.8", // v1.9.1
        "league/flysystem-aws-s3-v3": "^1.0", // 1.0.23
        "league/flysystem-cached-adapter": "^1.0", // 1.0.9
        "league/html-to-markdown": "^4.8", // 4.8.2
        "liip/imagine-bundle": "^2.1", // 2.1.0
        "nexylan/slack-bundle": "^2.1,<2.2.0", // v2.1.0
        "oneup/flysystem-bundle": "^3.0", // 3.1.0
        "php-http/guzzle6-adapter": "^1.1", // v1.1.1
        "phpdocumentor/reflection-docblock": "^3.0|^4.0", // 4.3.1
        "sensio/framework-extra-bundle": "^5.1", // v5.4.1
        "stof/doctrine-extensions-bundle": "^1.3", // v1.3.0
        "symfony/asset": "^4.0", // v4.3.4
        "symfony/console": "^4.0", // v4.3.4
        "symfony/flex": "^1.9", // v1.21.6
        "symfony/form": "^4.0", // v4.3.4
        "symfony/framework-bundle": "^4.0", // v4.3.4
        "symfony/mailer": "4.3.*", // v4.3.4
        "symfony/messenger": "4.3.*", // v4.3.4
        "symfony/property-access": "4.3.*", // v4.3.4
        "symfony/property-info": "4.3.*", // v4.3.4
        "symfony/security-bundle": "^4.0", // v4.3.4
        "symfony/sendgrid-mailer": "4.3.*", // v4.3.4
        "symfony/serializer": "4.3.*", // v4.3.4
        "symfony/twig-bundle": "^4.0", // v4.3.4
        "symfony/validator": "^4.0", // v4.3.4
        "symfony/web-server-bundle": "^4.0", // v4.3.4
        "symfony/webpack-encore-bundle": "^1.4", // v1.6.2
        "symfony/yaml": "^4.0", // v4.3.4
        "twig/cssinliner-extra": "^2.12", // v2.12.0
        "twig/extensions": "^1.5", // v1.5.4
        "twig/extra-bundle": "^2.12|^3.0", // v2.12.1
        "twig/inky-extra": "^2.12", // v2.12.0
        "twig/twig": "^2.12|^3.0" // v2.13.1
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.0", // 3.2.2
        "easycorp/easy-log-handler": "^1.0.2", // v1.0.7
        "fzaninotto/faker": "^1.7", // v1.8.0
        "symfony/browser-kit": "4.3.*", // v4.3.5
        "symfony/debug-bundle": "^3.3|^4.0", // v4.3.4
        "symfony/dotenv": "^4.0", // v4.3.4
        "symfony/maker-bundle": "^1.0", // v1.13.0
        "symfony/monolog-bundle": "^3.0", // v3.4.0
        "symfony/phpunit-bridge": "^3.3|^4.0", // v4.3.4
        "symfony/stopwatch": "4.3.*", // v4.3.4
        "symfony/var-dumper": "^3.3|^4.0", // v4.3.4
        "symfony/web-profiler-bundle": "4.3.*" // v4.3.4
    }
}

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What PHP libraries does this tutorial use?

Show Lines	// ... line 1
	<container>
	{# Header #}
	<hr>
	<spacer size="20"></spacer>
	<row>
	<columns>
	<p>
	What a week {{ email.toName }}! Here's a quick review of what you've been up to on the Space Bar this week
	</p>
	</columns>
	</row>
	<row>
	<columns>
	<table>
	<tr>
	<th>#</th>
	<th>Title</th>
	<th>Comments</th>
	</tr>
	<tr>
	<td>1</td>
	<td>Article Title</td>
	<td>99</td>
	</tr>
	</table>
	</columns>
	</row>
	<row>
	<columns>
	<center>
	<spacer size="20"></spacer>
	<button href="{{ url('app_homepage') }}">Check on the Space Bar</button>
	<spacer size="20"></spacer>
	</center>
	</columns>
	</row>
	{# Footer #}
	</container>
Show Lines	// ... lines 40 - 41

	{% apply inky_to_html\|inline_css(source('@styles/foundation-emails.css'), source('@styles/email.css')) %}
	<container>
Show Lines	// ... lines 3 - 38
	</container>
	{% endapply %}

Show Lines	// ... lines 1 - 6
	use Symfony\Bridge\Twig\Mime\TemplatedEmail;
Show Lines	// ... lines 8 - 16
	class AuthorWeeklyReportSendCommand extends Command
	{
Show Lines	// ... lines 19 - 40
	protected function execute(InputInterface $input, OutputInterface $output)
	{
Show Lines	// ... lines 43 - 47
	foreach ($authors as $author) {
Show Lines	// ... lines 49 - 53
	if (count($articles) === 0) {
	continue;
	}

	$email = (new TemplatedEmail())
Show Lines	// ... lines 59 - 67
	}
Show Lines	// ... lines 69 - 71
	}
	}

Show Lines	// ... lines 1 - 14
	use Symfony\Component\Mime\NamedAddress;
Show Lines	// ... line 16
	class AuthorWeeklyReportSendCommand extends Command
	{
Show Lines	// ... lines 19 - 40
	protected function execute(InputInterface $input, OutputInterface $output)
	{
Show Lines	// ... lines 43 - 47
	foreach ($authors as $author) {
Show Lines	// ... lines 49 - 57
	$email = (new TemplatedEmail())
	->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
Show Lines	// ... lines 60 - 67
	}
Show Lines	// ... lines 69 - 71
	}
	}

Show Lines	// ... lines 1 - 13
	use Symfony\Component\Mailer\MailerInterface;
Show Lines	// ... lines 15 - 16
	class AuthorWeeklyReportSendCommand extends Command
	{
Show Lines	// ... lines 19 - 22
	private $mailer;

	public function __construct(UserRepository $userRepository, ArticleRepository $articleRepository, MailerInterface $mailer)
	{
Show Lines	// ... lines 27 - 30
	$this->mailer = $mailer;
	}
Show Lines	// ... lines 33 - 72
	}

Show Lines	// ... lines 1 - 16
	class AuthorWeeklyReportSendCommand extends Command
	{
Show Lines	// ... lines 19 - 40
	protected function execute(InputInterface $input, OutputInterface $output)
	{
Show Lines	// ... lines 43 - 47
	foreach ($authors as $author) {
Show Lines	// ... lines 49 - 57
	$email = (new TemplatedEmail())
	->from(new NamedAddress('alienmailcarrier@example.com', 'The Space Bar'))
	->to(new NamedAddress($author->getEmail(), $author->getFirstName()))
	->subject('Your weekly report on the Space Bar!')
	->htmlTemplate('email/author-weekly-report.html.twig')
	->context([
	'author' => $author,
	'articles' => $articles,
	]);
	$this->mailer->send($email);
	}
Show Lines	// ... lines 69 - 71
	}
	}

	{% apply inky_to_html\|inline_css(source('@styles/foundation-emails.css'), source('@styles/email.css')) %}
	<container>
	<row class="header">
	<columns>
	<a href="{{ url('app_homepage') }}">
	<img src="{{ email.image('@images/email/logo.png') }}" class="logo" alt="SpaceBar Logo">
	</a>
	</columns>
	</row>

	{% block content %}
	{% endblock %}

	<row class="footer">
	<columns>
	<p>Cheers,</p>
	<p>Your friendly <em>Space Bar Team</em></p>
	</columns>
	</row>
	<row class="bottom">
	<columns>
	<center>
	<spacer size="20"></spacer>
	<div>
	Sent with ❤️ from the friendly folks at The Space Bar
	</div>
	</center>
	</columns>
	</row>
	</container>
	{% endapply %}

	{% extends 'email/emailBase.html.twig' %}

	{% block content %}
	<row class="welcome">
	<columns>
	<spacer size="35"></spacer>
	<h1>
	<center>
	Nice to meet you {{ email.toName }}!
	</center>
	</h1>
	<spacer size="10"></spacer>
	</columns>
	</row>
	<spacer size="30"></spacer>
	<row>
	<columns>
	<p>
	Welcome to <strong>the Space Bar</strong>, we can't wait to read what you have to write.
	Get started on your first article and connect with the space bar community.
	</p>
	</columns>
	</row>
	<row>
	<columns>
	<center>
	<button href="{{ url('admin_article_new') }}">Get writing!</button>
	</center>
	</columns>
	</row>
	<row>
	<columns>
	<p>
	Check out our existing articles and share your thoughts in the comments!
	</p>
	</columns>
	</row>
	<row>
	<columns>
	<center>
	<button href="{{ url('app_homepage') }}">Get reading!</button>
	</center>
	</columns>
	</row>
	<row>
	<columns>
	<p>
	We're so excited that you've decided to join us in our corner of the universe,
	it's a friendly one with other creative and insightful writers just like you!
	Need help from a friend? We're always just a message away.
	</p>
	</columns>
	</row>
	{% endblock %}