How to Set Dynamic Email Subject in Magento 2

 Steps to Set Dynamic Email Subject in Magento 2:

Step 1: Create an email template configuration file at the below path


app\code\Vendor\Extension\etc\email_templates.xml 


Then add the below code


<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Email:etc/email_templates.xsd">

    <template id="your_email_template_id" label="Label of your template file" file="email_file.html" type="html" module="Vendor_Extension" area="frontend"/>

</config>

Step 2: Now create an email template file at the following path


app\code\Vendor\Extension\view\frontend\email\email_file.html


Now add the below code snippet


<!--@subject {{var subject|raw }}@-->

<!--@vars

{"var customerName":"Customer Name",

"var customerEmail":"Customer Email",

"var customerComment":"Comment"}

@-->

<body style="background:#F6F6F6; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:12px; margin:0; padding:0;">

<div style="background:#F6F6F6; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:12px; margin:0; padding:0;">

<table cellspacing="0" cellpadding="0" border="0" height="100%" width="100%">

    <tr>

        <td align="center" valign="top" style="padding:20px 0 20px 0">

            <table bgcolor="FFFFFF" cellspacing="0" cellpadding="10" border="0" width="650" style="border:1px solid #E0E0E0;">

                <tr>

                    <td valign="top" colspan="5">

                        <h1 style="font-size:22px; font-weight:normal; line-height:22px; margin:0 0 11px 0;">Hello Admin,</h1>

                    </td>

                </tr>

                <tr>

                    <td valign="top" colspan="5">

                        <p style="border:1px solid #E0E0E0; font-size:12px; line-height:16px; margin:0; padding:13px 18px; background:#F9F9F9;">You Have Received New Query As Bellow.<p>

                    </td>

                </tr>

                <tr>

                    <td valign="top" colspan="5">

                        <p style="border:1px solid #E0E0E0; font-size:12px; line-height:16px; margin:0; padding:13px 18px; background:#F9F9F9;">Customer Name : <strong>{{var customerName}}</strong></td>

                </tr>

                <tr>

                    <td valign="top" colspan="5">

                        <p style="border:1px solid #E0E0E0; font-size:12px; line-height:16px; margin:0; padding:13px 18px; background:#F9F9F9;">Customer Email : <strong>{{var customerEmail}}</strong></td>

                </tr>

                <tr>

                    <td valign="top" colspan="5">

                        <p style="border:1px solid #E0E0E0; font-size:12px; line-height:16px; margin:0; padding:13px 18px; background:#F9F9F9;">Customer Comment : <strong>{{var customerComment}}</strong></td>

                </tr>

                <tr>

                    <td valign="top" colspan="5">

                        <p style="border:1px solid #E0E0E0; font-size:12px; line-height:16px; margin:0; padding:13px 18px; background:#F9F9F9; text-align:center;"><strong>Thank you.</strong></td>

                </tr>

            </table>

        </td>

    </tr>

</table>

</div>

</body>

Step 3: Now the template is ready and we will do the code for sending mail.


Go to your controller file


app\code\Vendor\Extension\Controller\Index\Index.php


Add the below-mentioned code


<?php

namespace Vendor\Extension\Controller\Index;

 

use Magento\Framework\App\Action\Context;

use Magento\Store\Model\StoreManagerInterface;

use Magento\Framework\Mail\Template\TransportBuilder;

use Magento\Framework\Translate\Inline\StateInterface;

 

class Index extends \Magento\Framework\App\Action\Action

{

    protected $transportBuilder;

    protected $storeManager;

    protected $inlineTranslation;

    protected $state;

 

    public function __construct(

        Context $context,

        StoreManagerInterface $storeManager,

        TransportBuilder $transportBuilder,

        StateInterface $state)

    {

        $this->transportBuilder = $transportBuilder;

        $this->storeManager = $storeManager;

        $this->inlineTranslation = $state;

        parent::__construct($context);

    }

    public function execute()

    {        

        $templateId = 'your_email_template_id'; // template id

        $fromEmail = 'admin@gmail.com';  // sender Email id

        $toEmail = 'test.magecomp@gmail.com'; // receiver email id

        $subject = 'your_dynamic_subject'; // Dynamic subject

        try

        {

            // template variables pass here

            $templateVars = [

                'subject' => $subject,

                'customerName' => 'Test',

                'customerEmail' => 'Magecomp',

                'customerComment' => 'Test Comment'

            ];

 

            $storeId = $this->storeManager->getStore()->getId();

            $this->inlineTranslation->suspend();

 

            $storeScope = \Magento\Store\Model\ScopeInterface::SCOPE_STORE;

            $templateOptions = [

                'area' => \Magento\Framework\App\Area::AREA_FRONTEND,

                'store' => $storeId

            ];

            

            $transport = $this->transportBuilder->setTemplateIdentifier($templateId, $storeScope)

                ->setTemplateOptions($templateOptions)

                ->setTemplateVars($templateVars)

                ->setFrom($fromEmail)

                ->addTo($toEmail)

                ->getTransport();

            $transport->sendMessage();

            $this->inlineTranslation->resume();

            $this->messageManager->addSuccessMessage(__('Your Email Sent successfully'));

            $this->_redirect('*/*/');

        }

        catch (\Exception $e)

        {

            $this->inlineTranslation->resume();

            $this->messageManager->addErrorMessage(__('We can\'t process your request' . $e->getMessage()));

            $this->_redirect('*/*/');

        }

    }

}

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