功能强大的PHP发邮件类

<?phpclass smtp{var $smtp_port;var $time_out;var $host_name;var $log_file;var $relay_host;var $debug;var $auth;var $user;var $pass;var $sock; function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass){$this->debug = true;$this->smtp_port = $smtp_port;$this->relay_host = $relay_host;$this->time_out = 30; $this->auth = $auth;$this->user = $user;$this->pass = $pass;$this->host_name = "localhost"; $this->log_file ="";$this->sock = FALSE;} function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = ""){$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";$header .= "Subject: ".$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 $this->smtp_error("sending HELO command");}#authif($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 = 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($this->sock, 512));$this->smtp_debug($response."/n");if (!ereg("^[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 (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 $message."<br>";}}function get_attach_type($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['context'] = $image_data;$filedata['filename']= basename($image_tag);$extension=substr($image_tag,strrpos($image_tag,"."),strlen($image_tag)-strrpos($image_tag,"."));switch($extension){case ".gif":$filedata['type'] = "image/gif";break;case ".gz":$filedata['type'] = "application/x-gzip";break;case ".htm":$filedata['type'] = "text/html";break;case ".html":$filedata['type'] = "text/html";break;case ".jpg":$filedata['type'] = "image/jpeg";break;case ".tar":$filedata['type'] = "application/x-tar";break;case ".txt":$filedata['type'] = "text/plain";break;case ".zip":$filedata['type'] = "application/zip";break;default:$filedata['type'] = "application/octet-stream";break;}return $filedata;}}/***实例化邮件类*/$smtpserver = "smtp.163.com";              //SMTP服务器$smtpserverport =25;                      //SMTP服务器端口$smtpusermail = "240331511@163.com";      //SMTP服务器的用户邮箱$smtpemailto = "240331511@163.com";       //发送给谁$smtpuser = "240331511@163.com";         //SMTP服务器的用户帐号$smtppass = "123147mcl";                 //SMTP服务器的用户密码$mailsubject = "PHP100测试邮件系统";        //邮件主题$mailbody = "<h1>你的用户名是张三，密码是123147mcl </h1>";      //邮件内容$mailtype = "HTML";                      //邮件格式（HTML/TXT）,TXT为文本邮件$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);$smtp->debug = true;                     //是否显示发送的调试信息$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);?>