friendica/include/Emailer.php

<?php

require_once('include/email.php');

class Emailer {
	/**
	 * Send a multipart/alternative message with Text and HTML versions
	 *
	 * @param fromName			name of the sender
	 * @param fromEmail			email fo the sender
	 * @param replyTo			replyTo address to direct responses
	 * @param toEmail			destination email address
	 * @param messageSubject	subject of the message
	 * @param htmlVersion		html version of the message
	 * @param textVersion		text only version of the message
	 * @param additionalMailHeader	additions to the smtp mail header
	 */
	static public function send($params) {

		$fromName = email_header_encode(html_entity_decode($params['fromName'],ENT_QUOTES,'UTF-8'),'UTF-8');
		$messageSubject = email_header_encode(html_entity_decode($params['messageSubject'],ENT_QUOTES,'UTF-8'),'UTF-8');

		// generate a mime boundary
		$mimeBoundary   =rand(0,9)."-"
				.rand(10000000000,9999999999)."-"
				.rand(10000000000,9999999999)."=:"
				.rand(10000,99999);

		// generate a multipart/alternative message header
		$messageHeader =
			$params['additionalMailHeader'] .
			"From: $fromName <{$params['fromEmail']}>\n" .
			"Reply-To: $fromName <{$params['replyTo']}>\n" .
			"MIME-Version: 1.0\n" .
			"Content-Type: multipart/alternative; boundary=\"{$mimeBoundary}\"";

		// assemble the final multipart message body with the text and html types included
		$textBody	=	chunk_split(base64_encode($params['textVersion']));
		$htmlBody	=	chunk_split(base64_encode($params['htmlVersion']));
		$multipartMessageBody =
			"--" . $mimeBoundary . "\n" .					// plain text section
			"Content-Type: text/plain; charset=UTF-8\n" .
			"Content-Transfer-Encoding: base64\n\n" .
			$textBody . "\n" .
			"--" . $mimeBoundary . "\n" .					// text/html section
			"Content-Type: text/html; charset=UTF-8\n" .
			"Content-Transfer-Encoding: base64\n\n" .
			$htmlBody . "\n" .
			"--" . $mimeBoundary . "--\n";					// message ending

		// send the message
		$res = mail(
			$params['toEmail'],	 									// send to address
			$messageSubject,								// subject
			$multipartMessageBody,	 						// message body
			$messageHeader									// message headers
		);
		logger("header " . 'To: ' . $params['toEmail'] . "\n" . $messageHeader, LOGGER_DEBUG);
		logger("return value " . $res, LOGGER_DEBUG);
	}
}
?>