How to send email using smtp gmail?

$emailConfig = array(
'protocol' => 'smtp',
'smtp_host' => 'ssl://smtp.googlemail.com',
'smtp_port' => 465,
'smtp_user' => 'yourEmail@gmail.com',
'smtp_pass' => 'yourEmailPassword',
'mailtype' => 'html',
'charset' => 'iso-8859-1'
);

// Set your email information
$from = array('email' => 'yourgoogleaccount@gmail.com', 'name' => 'Your Name');
$to = array('recipient_address@gmail.com', 'other@email.com');
$subject = 'Your gmail subject here';

$message = 'Type your gmail message here';
// Load CodeIgniter Email library
$this->load->library('email', $emailConfig);

// Sometimes you have to set the new line character for better result
$this->email->set_newline("rn");
// Set email preferences
$this->email->from($from['email'], $from['name']);
$this->email->to($to);

$this->email->subject($subject);
$this->email->message($message);
// Ready to send email and check whether the email was successfully sent

if (!$this->email->send()) {
// Raise error message
show_error($this->email->print_debugger());
}
else {
// Show success notification or other things here
echo 'Success to send email';
}

If those error occurred, make sure extension=php_smtp.dll and extension=php_openssl.dll uncommented in php.ini. and if you use xampp make sure you change php.ini in xampp/apache/bin/php.ini. If php.ini doesn’t exists to that directory, copy php.ini from xampp/php/php.ini to xampp/apache/bin/.

$this->email->set_newline enclose with double quotes. this is very important or else it does not work.
that is because in PHP n only means new line if it is in double quotes. In single quotes it means the literal character