classSimpleMail.php

<?php

/**
 * PHP Simple Mail (SMTP)
 * @Original author Hamid Samak <hamid@limny.org>
 * @Original code at https://github.com/hamidsamak/simplemail
 * @Additional work by halojoy https://github.com/halojoy
 * @Code at https://github.com/halojoy/SimpleMail
 * @Copyright 2016 Hamid Samak
 * @License MIT License
 */

class SimpleMail {

	// smtp host
	public $host;
	// smtp port
	public $port;
	// security mode (ssl or tls)
	public $security;

	// smtp username
	public $user;
	// smtp password
	public $pass;

	// mail from
	public $from;
	// to recipient
	public $to = array();

	// mail subject
	public $subject;
	// message content
	public $message;

	// mail content type (text/html or text/plain)
	public $type = 'text/html';
	// mail encoding
	public $encoding = 'UTF-8';

	// error message
	public $error;
	// print results
	public $debug = false;

/////////////////////////////////////////////////////////////////

    public function __construct($host, $port, $security = 'ssl')
    {
        $this->host = $host;
        $this->port = $port;
        $this->security = $security;
    }

    public function auth($user, $pass)
    {
        $this->user = $user;
        $this->pass = $pass;
    }

	/**
	 * set sender
	 * @param  string $address email address
	 * @param  string $name sender name
	 * @return void
	 */
	public function from($address, $name = null) {
		if (empty($name))
			$this->from = '<' . $address . '>';
		else
			$this->from = '"' . $name . '" <' . $address . '>';
	}

	/**
	 * set recipient(s)
	 * @param  string $address email address
	 * @param  string $name recipient name
	 * @return void
	 */
	public function to($address, $name = null) {
		if (empty($name))
			$this->to[] = '<' . $address . '>';
		else
			$this->to[] = '"' . $name . '" <' . $address . '>';
	}

	/**
	 * send mail
	 * @return boolean
	 */
	public function send() {
		$host = $this->host;

		if ($this->security == 'ssl')
			$host = 'ssl://' . $host;

		$socket = fsockopen($host, $this->port, $errno, $errstr);

		if ($socket === false) {
			$this->error = $errno . ' ' . $errstr;

			return false;
		} else if ($this->parse_result($socket, 220) === false)
			return false;

		$commands = array(
			'EHLO ' . $this->host => 250
		);

		if ($this->security == 'tls')
			$commands = array_merge($commands, array(
				'STARTTLS' => 220,
				'EHLO  ' . $this->host => 250
			));

		$commands = array_merge($commands, array(
			'AUTH LOGIN' => 334,
			base64_encode($this->user) => 334,
			base64_encode($this->pass) => 235,
			'MAIL FROM: ' . strstr($this->from, '<') => 250,
		));

		foreach ($this->to as $to)
			$commands['RCPT TO: ' . strstr($to, '<')] = 250;

		$commands = array_merge($commands, array(
			'DATA' => 354,
			'Subject: ' . $this->subject . "\r\n" .
				'To: ' . implode(', ', $this->to) . "\r\n" .
				'From: ' . $this->from . "\r\n" .
                'Reply-To: ' . $this->from . "\r\n" .
				'Content-Type: ' . $this->type . "\r\n" .
				'Content-Encoding: ' . $this->encoding . "\r\n\r\n" .
				$this->message => -1,
			'.' => 250,
			'QUIT' => 0
		));

		foreach ($commands as $command => $code) {
			fwrite($socket, $command . "\r\n");

			if ($code > -1 && $this->parse_result($socket, $code) === false) {
				$this->error .= ' (' . $command . ')';

				return false;
			}

			if ($command == 'STARTTLS' && stream_socket_enable_crypto($socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT) === false) {
				$this->error .= 'Unable to start TLS encryption. (' . $command . ')';

				return false;
			}
		}

		fclose($socket);

		return true;
	}

	/**
	 * parse request result and check result with expected code
	 * @param  resource $socket connection
	 * @param  integer  $code   expected code
	 * @return boolean
	 */
	private function parse_result($socket, $code) {
		$result = '';
		while (substr($result, 3, 1) != ' ')
			$result = fgets($socket, 256);

		if ($this->debug === true)
			echo $result . '<br>' . "\n";

		if (empty($code) || substr($result, 0, 3) == $code)
			return true;

		$this->error = $result;

		return false;
	}
}

?>