Sendemail.php - Controllers <?php defined('BASEPATH') OR exit('No direct script access allowed'); class Sendemail extends CI_Controller { public function index() { $this->load->view('sendemail'); } public function send() { $subject = 'Application for Programmer Registration By - ' . $this->input->post("name"); $programming_languages = implode(", ", $this->input->post("programming_languages")); $file_data = $this->upload_file(); if(is_array($file_data)) { $message = ' <h3 align="center">Programmer Details</h3> <table border="1" width="100%" cellpadding="5"> <tr> <td width="30%">Name</td> <td width="70%">'.$this->input->post("name").'</td> </tr> <tr> <td width="30%">Address...