example-code/php-laravel/app/Mail/ChangeEmail.php

<?php

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class ChangeEmail extends Mailable
{
    use Queueable, SerializesModels;

    /**
     * Create a new message instance.
     *
     * @return void
     */
	public $current_email;
	public $link;

    public function __construct($current_email, $link)
    {
        $this->current_email = $current_email;
        $this->link = $link;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        $this->view('change-email');
		$this->subject('Email change requested');
        return $this;
    }
}