简单的PHP邮件发送类

<?php
/**
 * SMTP类
 * @package         DolrPHP
 * @author          Joy chao 
 * @version         v2.0
 * @copyright       Copyright (c) 2012. DolrPHP.com
 * @modifier        Joy chao 
 * @lastmodified    Joy chao    2012-4-30
 */
class Smtp {
	public $smtp_host; 	//SMTP主机,如: smtp.qq.com
	public $smtp_port = 25;	//SMTP端口
	public $auth = TRUE;	//是否需要帐户认证
	public $user;		//帐户名
	public $pass;		//帐户密码
	public $debug = FALSE;	//开启调试
	public $time_out;
	public $host_name;
	public $log_file;
	public $sock;
	/**
	 * 构造函数，连接smtp服务器
	 * @param string 	smtp服务器
	 * @param int 		smtp服务器端口
	 * @param bool 		smtp服务器是否需要认证
	 * @param string 	smtp服务器邮件帐号
	 * @param string 	smtp服务器邮件密码
	 */
	function smtp($smtp_host, $smtp_port = 25, $auth = TRUE, $user = '', $pass = '') {
		$this->debug     = FALSE;
		$this->smtp_port = trim ( $smtp_port );
		$this->smtp_host = trim ( $smtp_host );
		$this->time_out  = 30; // is used in fsockopen()
		$this->auth      = trim ( $auth ); // auth
		$this->user      = trim ( $user );
		$this->pass      = trim ( $pass );
		$this->host_name = "localhost"; // is used in HELO command
		$this->log_file  = '';
		$this->sock      = FALSE;
	}
	/**
	 * 发送邮件主方法
	 * @param  string $to                 收件人
	 * @param  string $mail_from          发件人
	 * @param  string $subject            主题
	 * @param  string $body               内容
	 * @param  string $mailtype           邮件类型（HTML/TXT）
	 * @param  string $cc                 抄送
	 * @param  string $bcc                密送
	 * @param  string $additional_headers 额外头信息
	 * @return boolean                    成功或者失败
	 */
	function sendmail($to, $mail_from, $subject = '', $body = '', $mailtype = "HTML", $cc = '', $bcc = '', $additional_headers = '') {
		$to           = trim ( $to );
		$stringEncode = mb_detect_encoding($body, array('UTF-8','GBK','ASCII','GB2312')); 
		$subject      = iconv($stringEncode,'UTF-8',$subject);
		$body         = iconv($stringEncode,'UTF-8',$body);
		$body         = preg_replace ( "/(^|(
))(.)/", "\1.\3", base64_encode($body));
		$header       = "MIME-Version:1.0
";
		if (strtoupper ( $mailtype ) == "HTML") {
			$header .= "Content-Type:text/html;charset=utf-8
";
		}
		$header .= "Content-Transfer-Encoding: base64
";
		$header .= "To: " . $to . "
";
		if ($cc != '') {
			$header .= "Cc: " . $cc . "
";
		}
		$header .= "From: " . $this->get_mailfrom ( $this->user, $mail_from ) . "
";
		$header .= "Subject: " . $subject . "
";
		$header .= $additional_headers;
		$header .= "Date: " . date ( "r" ) . "
";
		$header .= "X-Mailer:By Apache (PHP/" . phpversion() . ")
";
		list ( $msec, $sec ) = explode ( ' ', microtime() );
		$header .= "Message-ID: <" . date ( 'YmdHis', $sec ) . "." . ($msec * 1000000) . "." . substr ( $mail_from, strpos ( $mail_from, '@' ) ) . ">
";
		$TO = explode ( ',', $this->strip_comment ( $to ) );
		if ($cc != '') {
			$TO = array_merge ( $TO, explode( ',', $this->strip_comment ( $cc ) ) );
		}
		if ($bcc != '') {
			$TO = array_merge ( $TO, explode ( ',', $this->strip_comment ( $bcc ) ) );
		}
		$sent = TRUE;
		foreach ( $TO as $rcpt_to ) {
			$rcpt_to = $this->get_address ( $rcpt_to );
			if (! $this->smtp_sockopen ( $rcpt_to )) {
				$this->log_write ( "Error: Cannot send email to " . $rcpt_to . "
" );
				$sent = FALSE;
				continue;
			}
			if ($this->smtp_send ( $this->host_name, $this->user, $rcpt_to, $header, $body )) {
				$this->log_write ( "E-mail has been sent to <" . $rcpt_to . ">
" );
			} else {
				$this->log_write ( "Error: Cannot send email to <" . $rcpt_to . ">
" );
				$sent = FALSE;
			}
			fclose ( $this->sock );
			$this->log_write ( "Disconnected from remote host
" );
		}
		return $sent;
	}
	/**
	 * 发送邮件
	 * @access public
	 */
	function smtp_send($helo, $from, $to, $header, $body = '') {
		if (! $this->smtp_putcmd ( "HELO", $helo )) {
			return $this->smtp_error ( "sending HELO command" );
		}
		// auth
		if ($this->auth) {
			if (! $this->smtp_putcmd ( "AUTH LOGIN", base64_encode ( $this->user ) )) {
				return $this->smtp_error ( "sending HELO command" );
			}
			if (! $this->smtp_putcmd ( '', base64_encode ( $this->pass ) )) {
				return $this->smtp_error ( "sending HELO command" );
			}
		}
		if (! $this->smtp_putcmd ( "MAIL", "FROM:<" . $from . ">" )) {
			return $this->smtp_error ( "sending MAIL FROM command" );
		}
		if (! $this->smtp_putcmd ( "RCPT", "TO:<" . $to . ">" )) {
			return $this->smtp_error ( "sending RCPT TO command" );
		}
		if (! $this->smtp_putcmd ( "DATA" )) {
			return $this->smtp_error ( "sending DATA command" );
		}
		if (! $this->smtp_message ( $header, $body )) {
			return $this->smtp_error ( "sending message" );
		}
		if (! $this->smtp_eom ()) {
			return $this->smtp_error ( "sending . [EOM]" );
		}
		if (! $this->smtp_putcmd ( "QUIT" )) {
			return $this->smtp_error ( "sending QUIT command" );
		}
		return TRUE;
	}
	function smtp_sockopen($address) {
		if ($this->smtp_host == '') {
			return $this->smtp_sockopen_mx ( $address );
		} else {
			return $this->smtp_sockopen_relay ();
		}
	}
	function smtp_sockopen_relay() {
		$this->log_write ( "Trying to " . $this->smtp_host . ":" . $this->smtp_port . "
" );
		$this->sock = @fsockopen ( $this->smtp_host, $this->smtp_port, $errno, $errstr, $this->time_out );
		if (! ($this->sock && $this->smtp_ok ())) {
			$this->log_write ( "Error: Cannot connenct to relay host " . $this->smtp_host . "
" );
			$this->log_write ( "Error: " . $errstr . " (" . $errno . ")
" );
			return FALSE;
		}
		$this->log_write ( "Connected to relay host " . $this->smtp_host . "
" );
		return TRUE;
	}
	function smtp_sockopen_mx($address) {
		$domain = ereg_replace ( "^.+@([^@]+)$", "
", $address );
		if (! @getmxrr ( $domain, $MXHOSTS )) {
			$this->log_write ( "Error: Cannot resolve MX "" . $domain . ""
" );
			return FALSE;
		}
		foreach ( $MXHOSTS as $host ) {
			$this->log_write ( "Trying to " . $host . ":" . $this->smtp_port . "
" );
			$this->sock = @fsockopen ( $host, $this->smtp_port, $errno, $errstr, $this->time_out );
			if (! ($this->sock && $this->smtp_ok ())) {
				$this->log_write ( "Warning: Cannot connect to mx host " . $host . "
" );
				$this->log_write ( "Error: " . $errstr . " (" . $errno . ")
" );
				continue;
			}
			$this->log_write ( "Connected to mx host " . $host . "
" );
			return TRUE;
		}
		$this->log_write ( "Error: Cannot connect to any mx hosts (" . implode ( ", ", $MXHOSTS ) . ")
" );
		return FALSE;
	}
	function smtp_message($header, $body) {
		fputs ( $this->sock, $header . "
" . $body );
		$this->smtp_debug ( "> " . str_replace ( "
", "
" . "> ", $header . "
> " . $body . "
> " ) );
		return TRUE;
	}
	function smtp_eom() {
		fputs ( $this->sock, "
.
" );
		$this->smtp_debug ( ". [EOM]
" );
		return $this->smtp_ok ();
	}
	function smtp_ok() {
		$response = str_replace ( "
", '', fgets ( $this->sock, 512 ) );
		$this->smtp_debug ( $response . "
" );
		if (! preg_match("/^[23]/", $response )) {
			fputs ( $this->sock, "QUIT
" );
			fgets ( $this->sock, 512 );
			$this->log_write ( "Error: Remote host returned "" . $response . ""
" );
			return FALSE;
		}
		return TRUE;
	}
	function smtp_putcmd($cmd, $arg = '') {
		if ($arg != '') {
			if ($cmd == '')
				$cmd = $arg;
			else
				$cmd = $cmd . " " . $arg;
		}
		fputs ( $this->sock, $cmd . "
" );
		$this->smtp_debug ( "> " . $cmd . "
" );
		return $this->smtp_ok ();
	}
	function smtp_error($string) {
		$this->log_write ( "Error: Error occurred while " . $string . ".
" );
		return FALSE;
	}
	function log_write($message) {
		$this->smtp_debug ( $message );
		if ($this->log_file == '') {
			return TRUE;
		}
		$message = date ( "M d H:i:s " ) . get_current_user () . "[" . getmypid () . "]: " . $message;
		if (! @file_exists ( $this->log_file ) || ! ($fp = @fopen ( $this->log_file, "a" ))) {
			$this->smtp_debug ( "Warning: Cannot open log file "" . $this->log_file . ""
" );
			return FALSE;
		}
		flock ( $fp, LOCK_EX );
		fputs ( $fp, $message );
		fclose ( $fp );
		return TRUE;
	}
	function strip_comment($address) {
		$comment = "/([^()]*)/";
		while ( preg_match( $comment, $address ) ) {
			$address = preg_replace ( $comment, '', $address );
		}
		return $address;
	}
	function get_address($address) {
		return trim ( preg_replace ( "/(.*[<])?([^<>]+)[>]?/i", "$2", $address ) );
	}
	function get_mailfrom($address,$mail_from) {
		return $mail_from . "<{$address}>";
	}
	function smtp_debug($message) {
		if ($this->debug) {
			return $message;
		}
	}
}//CLASS SMTP END-----

<?php
/**
 * SMTP邮件发送演示
 *
 * @author  Joychao 
 **/
//包含SMTP类文件
include './Smtp.class.php';
$smtpserver   = "smtp.exmail.qq.com";	//SMTP服务器 
$smtpport     = 25;						//SMTP服务器端口 
$smtpusermail = "admin@joychao.cc";		//SMTP服务器的用户邮箱 
$smtpuser     = "admin@joychao.cc";		//SMTP服务器的用户帐号 
$smtppass     = "123456";				//SMTP服务器的用户密码 
$mailfrom     =	"Joychao'Blog";			//发送者名称
$mailto       = '44294631@qq.com';		//发送给谁（QQ邮箱情况下不能和上面的登录帐户一样，否则发不出去）
$mailsubject  = "Hello world!这是一封测试邮件的标题";	//邮件主题 
$mailbody     = '您好！这是一封测试邮件来自Joychao'Blog';//邮件内容，支持HTML
$mailtype     = "HTML";					//邮件格式（HTML/TXT）,TXT为文本邮件 
########################################## 
//这里面的一个true是表示使用身份验证,否则不使用身份验证. 
$smtp = new Smtp($smtpserver,$smtpport,true,$smtpuser,$smtppass);//实例化SMTP类
//是否显示调试信息 
$smtp->debug = 1;
//发送邮件
$res=$smtp->sendmail($mailto, $mailfrom, $mailsubject, $mailbody, $mailtype);
if($res){
	echo '发送成功';
}else{
	echo '发送失败';
}