使用PHP发送邮件

1. [文件]     email.class.php

<?php
class smtp
{
	/* Public Variables */
	var $smtp_port;
	var $time_out;
	var $host_name;
	var $log_file;
	var $relay_host;
	var $debug;
	var $auth;
	var $user;
	var $pass;
	
	/* Private Variables */
	var $sock;
	
	/* Constractor */
	function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass){
		$this -> debug = FALSE;
		$this -> smtp_port = $smtp_port;
		$this -> relay_host = $relay_host;
		$this -> time_out = 30; //is used in fsockopen()
		#
		$this -> auth = $auth; //auth
		$this -> user = $user;
		$this -> pass = $pass;
		#
		$this -> host_name = "localhost"; //is used in HELO command
		$this -> log_file = "";
		
		$this -> sock = FALSE;
	}
	
	/* Main Function */
	function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = ""){
		$mail_from = $this -> get_address($this -> strip_comment($from));
		$body = preg_replace("/(^|(\r\n))(\\.)/", "\\1.\\3", $body);
		@$header .= "MIME-Version:1.0\r\n";
		
		if($mailtype == "HTML"){
			$header .= "Content-Type:text/html\r\n";
		}
		$header .= "To: " . $to . "\r\n";
		if($cc != ""){
			$header .= "Cc: " . $cc . "\r\n";
		}
		$header .= "From: $from<" .$from . ">\r\n";
		$header .= "Subject: " . $subject . "\r\n";
		$header .= $additional_headers;
		$header .= "Date: " . date("r") . "\r\n";
		$header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")\r\n";
		list($msec, $sec) = explode(" ", microtime());
		$header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec*1000000) . "." . $mail_from . ">\r\n";
		$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 . "\n");
				$sent = FALSE;
				continue;
			}
			if($this -> smtp_send($this -> host_name, $mail_from, $rcpt_to, $header, $body)){
				$this -> log_write("E-mail has been sent to <" . $rcpt_to . ">\n");
			}else{
				$this -> log_write("Error: Cannot send email to <" . $rcpt_to . ">\n");
				$sent = FALSE;
			}
			fclose($this -> sock);
			$this -> log_write("Disconnected from remote host\n");
		}
		echo "<br>";
		echo $header;
		return $sent;
	}
	
	/* Private Functions */
	
	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 <CR><LF>.<CR><LF> [EOM]");
		}
	
		if(!$this -> smtp_putcmd("QUIT")){
			return $this -> smtp_error("sending QUIT command");
		}
	
		return TRUE;
	}
	
	function smtp_sockopen($address){
		if($this -> relay_host == ""){
			return $this -> smtp_sockopen_mx($address);
		}else{
			return $this -> smtp_sockopen_relay();
		}
	}
	
	function smtp_sockopen_relay(){
		$this -> log_write("Trying to " . $this -> relay_host . ":" . $this -> smtp_port . "\n");
		$this -> sock = @fsockopen($this -> relay_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 -> relay_host . "\n");
			$this -> log_write("Error: " . $errstr." (" . $errno . ")\n");
			return FALSE;
		}
		$this -> log_write("Connected to relay host " . $this -> relay_host . "\n");
		return TRUE;
	}
	
	function smtp_sockopen_mx($address){
		$domain = preg_replace("^.+@([^@]+)$", "\\1", $address);
		if(!@getmxrr($domain, $MXHOSTS)){
			$this -> log_write("Error: Cannot resolve MX \"" . $domain . "\"\n");
			return FALSE;
		}
		foreach ($MXHOSTS as $host) {
			$this -> log_write("Trying to " . $host . ":" . $this -> smtp_port . "\n");
			$this -> sock = @fsockopen($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 . "\n");
				$this -> log_write("Error: " . $errstr . " (" . $errno . ")\n");
				continue;
			}
			$this -> log_write("Connected to mx host " . $host . "\n");
			return TRUE;
		}
		$this -> log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n");
		return FALSE;
	}
	
	function smtp_message($header, $body){
		fputs($this -> sock, $header . "\r\n" . $body);
		$this -> smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));
	
		return TRUE;
	}
	
	function smtp_eom(){
		fputs($this -> sock, "\r\n.\r\n");
		$this -> smtp_debug(". [EOM]\n");
	
		return $this -> smtp_ok();
	}
	
	function smtp_ok(){
		$response = str_replace("\r\n", "", fgets($this -> sock, 512));
		$this -> smtp_debug($response . "\n");
	
		if(!preg_match("/^[23]/", $response)){
			fputs($this -> sock, "QUIT\r\n");
			fgets($this -> sock, 512);
			$this -> log_write("Error: Remote host returned \"" . $response . "\"\n");
			return FALSE;
		}
		return TRUE;
	}
	
	function smtp_putcmd($cmd, $arg = ""){
		if($arg != ""){
			if($cmd == "") 
				$cmd = $arg;
			else 
				$cmd = $cmd . " " . $arg;
		}
	
		fputs($this -> sock, $cmd . "\r\n");
		$this -> smtp_debug("> " . $cmd . "\n");
	
		return $this -> smtp_ok();
	}
	
	function smtp_error($string){
		$this -> log_write("Error: Error occurred while " . $string . ".\n");
		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 \"" . $this -> log_file . "\"\n");
			return FALSE;
		}
		flock($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){
		$address = preg_replace("/([ \t\r\n])+/", "", $address);
		$address = preg_replace("/^.*<(.+)>.*$/", "\\1", $address);
	
		return $address;
	}
	
	function smtp_debug($message){
		if($this -> debug){
			echo $message . "<br>";
		}
	}
	
	function get_attach_type($image_tag){ //
	
		$filedata = array();
	
		$img_file_con = fopen($image_tag, "r");
		unset($image_data);
		while ($tem_buffer = AddSlashes(fread($img_file_con, filesize($image_tag))))
		$image_data .= $tem_buffer;
		fclose($img_file_con);
	
		$filedata[&#39;context&#39;] = $image_data;
		$filedata[&#39;filename&#39;]= basename($image_tag);
		$extension = substr($image_tag, strrpos($image_tag, "."), strlen($image_tag) - strrpos($image_tag, "."));
		switch($extension){
			case ".gif":
			$filedata[&#39;type&#39;] = "image/gif";
			break;
			case ".gz":
			$filedata[&#39;type&#39;] = "application/x-gzip";
			break;
			case ".htm":
			$filedata[&#39;type&#39;] = "text/html";
			break;
			case ".html":
			$filedata[&#39;type&#39;] = "text/html";
			break;
			case ".jpg":
			$filedata[&#39;type&#39;] = "image/jpeg";
			break;
			case ".tar":
			$filedata[&#39;type&#39;] = "application/x-tar";
			break;
			case ".txt":
			$filedata[&#39;type&#39;] = "text/plain";
			break;
			case ".zip":
			$filedata[&#39;type&#39;] = "application/zip";
			break;
			default:
			$filedata[&#39;type&#39;] = "application/octet-stream";
			break;
		}
		return $filedata;
	}
}
?>

2. [文件]     sendmail.php

<?php

require_once (&#39;email.class.php&#39;);
//##########################################
$smtpserver = "smtp.qq.com";//SMTP服务器
$smtpserverport = 25;//SMTP服务器端口
$smtpusermail = "xxx@qq.com";//SMTP服务器的用户邮箱
$smtpemailto = "yyy@sina.com";//发送给谁
$smtpuser = "xxx";//SMTP服务器的用户帐号
$smtppass = "******";//SMTP服务器的用户密码
$mailsubject = "PHP100测试邮件系统";//邮件主题
$mailbody = "<h1> 这是一个测试程序 PHP100.com </h1>";//邮件内容
$mailtype = "HTML";//邮件格式（HTML/TXT）,TXT为文本邮件
//##########################################
$smtp = new smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass);//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 -> debug = FALSE;//是否显示发送的调试信息
$smtp -> sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);

?>