Wordpress function to configure PHPMailer to use SMTP

wp-smtp.php

add_action( 'phpmailer_init', 'wph_phpmailer_init' );
function wph_phpmailer_init( PHPMailer $phpmailer ) {
	$phpmailer->IsSMTP();
	$phpmailer->setFrom('NOREPLY@DOMAIN.COM', 'WEBSITE'); // default from address
	$phpmailer->SMTPAuth = true; // enable SMTP authentication
	$phpmailer->Port = 587; // set the SMTP server port
	$phpmailer->Host = 'SMTP_HOST'; // SMTP server
	$phpmailer->Username = 'SMTP_USERNAME'; // SMTP server username
	$phpmailer->Password = 'SMTP_PASSWORD'; // SMTP server password
	$phpmailer->SMTPSecure = 'tls';
}