How to send email with codeigniter using sendgrid

in this article, we will explain to you how to send email with codeigniter using sendgrid. we are using sendgrid library in this article.

Step 1: Install SendGrid library using Composer

In this step, we will download sendgrid library using composer. so you can follow below command and store this library into application/third_party/sendgrid_lib/ directory.

composer require sendgrid/sendgrid

Step 2: Create Library file

in this step, we will create a MailSendLib.php library file into application/libraries directory and paste below code in this file

require APPPATH . 'third_party/sendgrid_lib/vendor/autoload.php';
class MailSendLib
{
    public function __construct()
    {
    }

    public function welcome_mail($data_arr)
    {
        $email = $data_arr["email"];
        $subject = $data_arr["subject"];
        $message = $data_arr["message"];

        $mail_data = [
            "to" => $email,
            "from" => "EMAIL_FROM",
            "subject" => $subject,
            "message" => $message_template
        ];
        return $this->mailsend($mail_data);
    }

    public function mailsend($data)
    {
        if (!empty($data["to"]) && !empty($data["from"]) &&  !empty($data["subject"]) &&  !empty($data["message"])) {
            $to = $data["to"];

            $from = $data["from"];
            $subject = $data["subject"];
            $message = $data["message"];
            $headers = "MIME-Version: 1.0" . "\r\n";
            $headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
            $headers .= "From: " . $from . "\r\n";
            $headers .= "Reply-To: " . $from . "\r\n";

            $apikey = "SENDGRID_APIKEY";
            $replyTo = "";
            if ($replyTo == "") {
                $replyTo = $from;
            }
            $from_name = "EMAIL_FROM_NAME";
            $email = new \SendGrid\Mail\Mail();
            $email->setFrom($from, $from_name);
            $email->setSubject($subject);
            $email->addTo($to);
            if (isset($data["addCc"]) && $data["addCc"] != "") {
                $email->addCc($data["addCc"]);
            }
            $email->setReplyTo($replyTo);
            $email->addContent("text/plain", "subject");
            $email->addContent("text/html", $message);

            $sendgrid = new \SendGrid($apikey);
            try {
                $response = $sendgrid->send($email);
                return 1;
            } catch (Exception $e) {
                return 0;
            }
        } else {
            return 0;
        }
    }
}
?>

Step 3: Use the Library in Controller

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
  
class Welcome extends CI_Controller {
  
    public function index()
    {
        $this->load->library('MailSendLib');
		$email = "to email";
		$subject = "your subject";
		
		$data = [];
        $data['subject'] = $subject ;
        $message = $this->load->view('welcome_mail',$data);
		

		$email_arr = array(
			"email"=>$email,
			"subject"=>$subject,
			"message"=>$message
		);		
		$data = $MailSendLib->welcome_mail($email_arr);
		if($data == 1){
			echo "email send has been succssfully";
		}else{
			echo "mail send failed";
		}
    }
}
?>