需要写一个smtp发送类

<?php
set_time_limit(120);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;var $sender;/* Private Variables */var $sock;/* Constractor */function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass,$sender){$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->sender = $sender;$this->host_name = "localhost"; //is used in HELO command$this->log_file = "";$this->logs = ""; //记录跟服务器的交互过程$this->sock = FALSE;}/* Main Function */function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = ""){$sent = TRUE;$mail_from = $this->get_address($this->strip_comment($from));$body = ereg_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";$header .= "From: ".$from."\r\n";$header .= "Subject: ".$subject."\r\n";$header .= $additional_headers;$header .= "Date: ".date("r")."\r\n";$header .= "X-Mailer: 72e.net (PHP/".phpversion().")\r\n";list($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)));}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");}return $sent;}/* Private Functions */function smtp_send($helo, $from, $to, $header, $body = ""){if (!$this->smtp_putcmd("HELO", $helo)) {return $this->smtp_error("sending HELO command");}#authif($this->auth){if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {return $this->smtp_error("sending AUTH command");}if (!$this->smtp_putcmd("", base64_encode($this->pass))) {return $this->smtp_error("sending AUTH command");}}#//if (!$this->smtp_putcmd("MAIL", "FROM:".$from."")) {if (!$this->smtp_putcmd("MAIL", "FROM:<".$this->sender.">")) {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 = ereg_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($this->sock, 512));//echo "response=".$response."\r\n";$this->smtp_debug($response."\n");//echo "ereg 23 ==".ereg("^[23]", $response)."\n";if (!ereg("^[23]", $response)) {//echo "@@@@@";fputs($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("> ".$cmd."\n");//echo "cmd=".$cmd."\r\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->logs .= $message;$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 (ereg($comment, $address)) {$address = ereg_replace($comment, "", $address);}return $address;}function get_address($address){$address = ereg_replace("([ \t\r\n])+", "", $address);$address = ereg_replace("^.*<(.+)>.*$", "\1", $address);return $address;}function smtp_debug($message){if ($this->debug) {echo $message;}}} // end class
?>

测试sina邮箱可否使用

<?php
include "smtp.php";$smtpserver = "smtp.sina.com";//您的smtp服务器的地址
$port = 25; //smtp服务器的端口，一般是 25
$smtpuser = "your-mail@sina.com"; //您登录smtp服务器的用户名
$smtppwd = "your-password"; //您登录smtp服务器的密码
$mailtype = "HTML"; //邮件的类型，可选值是 TXT 或 HTML ,TXT 表示是纯文本的邮件,HTML 表示是 html格式的邮件
$sender = "your-mail@sina.com"; //发件人,一般要与您登录smtp服务器的用户名($smtpuser)相同,否则可能会因为smtp服务器的设置导致发送失败
$smtp  =   new smtp($smtpserver,$port,true,$smtpuser,$smtppwd,$sender);
$smtp->debug = true; //是否开启调试,只在测试程序时使用，正式使用时请将此行注释
$to = "bubifengyun@sina.com"; //收件人
$subject = "你好";
$body = "<h1>这是一个用 <font color='red'><b> php socket </b></font> 发邮件的测试。支持SMTP认证！</h1>";
$send=$smtp->sendmail($to,$sender,$subject,$body,$mailtype);
if($send==1){echo "邮件发送成功";
}else{echo "邮件发送失败<br>";echo "原因：".$this->smtp->logs;
}
?>