PHP class for sending emails

class emailui
{
 static function runlog($mode = 'SMTP',$b = '',$c = '',$d='') {

 }
 static function sendmail($toemail, $subject, $message, $from='',$cfg = array(), $sitename='') {
 global $db_wwwname,$mail_port,$mail_id,$mail_server,$mail_pw,$mail_type,$db_charset,$ version,$smtpfrom;

 $sitename = $sitename ? $sitename : $db_wwwname;
 $adminemail = $mail_id ? $mail_id : 'admin@54ui.com';

 if($cfg && is_array($cfg)) {
 $adminemail = $cfg['from'];
 $mail_type = $cfg['mail_type']; //Email sending mode
 $mail = $cfg;
 } else {
 $adminemail = $mail_id;
 $ mail_type = $mail_type; //Mail sending mode
 #Port, mail header delimiter, recipient address contains user name
 $mail= Array (
 'mailsend' => 2,
 'maildelimiter' => 1,
 'mailusername' => 1,
 'server' => $mail_server, #server
 'port' => $mail_port, #port
 'auth' => $mail_id, #author
 'from ' => $mail_id, #Sender
 'auth_username' => $mail_id, #Account
 'auth_password' => $mail_pw #Password
 );
 }
 //mail sending mode
 if(!$mail_type ) {
 $headers = 'MIME-Version: 1.0' . "rn";
 $headers .= 'Content-type: text/html; charset='.$db_charset.'' . "rn";
 $headers . = 'From: '.$sitename.' <'.$from.'>' . "rn";
 mail($toemail, $subject, $message, $headers);
 return true;
 }
 / /The delimiter of the mail header
 $maildelimiter = $mail['maildelimiter'] == 1 ? "rn" : ($mail['maildelimiter'] == 2 ? "r" : "n");
 //Receive The sender address contains the username
 $mailusername = isset($mail['mailusername']) ? $mail['mailusername'] : 1;
 //Port
 $mail['port'] = $mail['port '] ? $mail['port'] : 25;
 $mail['mailsend'] = $mail['mailsend'] ? $mail['mailsend'] : 1;
 //Sender
 $email_from = $ from == '' ? '=?'.$db_charset.'?B?'.base64_encode($sitename)."?= <".$adminemail.">" : (preg_match('/^(.+ ?) <(.+?)>$/',$from, $mats) ? '=?'.$db_charset.'?B?'.base64_encode($mats[1])."?= < $mats[2]>" : $from);
 //Recipient
 $email_to = preg_match('/^(.+?) <(.+?)>$/',$toemail, $mats ) ? ($mailusername ? '=?'.$db_charset.'?B?'.base64_encode($mats[1])."?= <$mats[2]>" : $mats[2]) : $toemail;;
 //Email title
 $email_subject = '=?'.$db_charset.'?B?'.base64_encode(preg_replace("/[r|n]/", '', $subject.'-- '.$db_wwwname)).'?=';
 //Mail content
 $message = $message."Published at ".gmdate("Y-m-d h:i:s",mktime ()+8*3600)." , Powered By uicms ".$version." (service.54ui.com)";
 $email_message = chunk_split(base64_encode(str_replace("n", "rn" , str_replace("r", "n", str_replace("rn", "n", str_replace("nr", "r", $message))))));

 $headers = "From: $email_from {$maildelimiter}X-Priority: 3{$maildelimiter} maildelimiter}Content-Transfer-Encoding: base64{$maildelimiter}";

 if(!$fp = fsockopen($mail['server'], $mail['port'], $errno, $errstr, 30)) {
 self::runlog('SMTP', "($mail[server]:$mail[port]) CONNECT - Unable to connect to the SMTP server", 0);
 return false;
 }
 stream_set_blocking($fp , true);

 $lastmessage = fgets($fp, 512);
 if(substr($lastmessage, 0, 3) != '220') {
 self::runlog('SMTP', "$mail[ server]:$mail[port] CONNECT - $lastmessage", 0);
 return false;
 }

 fputs($fp, ($mail['auth'] ? 'EHLO' : 'HELO')." uchomern ");
 $lastmessage = fgets($fp, 512);
 if(substr($lastmessage, 0, 3) != 220 && substr($lastmessage, 0, 3) != 250) {
 self::runlog ('SMTP', "($mail[server]:$mail[port]) HELO/EHLO - $lastmessage", 0);
 return false;
 }

 while(1) {
 if(substr($lastmessage , 3, 1) != '-' || empty($lastmessage)) {
 break;
 }
 $lastmessage = fgets($fp, 512);
 }

    if($mail['auth']) {
        fputs($fp, "AUTH LOGINrn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 334) {
            self::runlog('SMTP', "($mail[server]:$mail[port]) AUTH LOGIN - $lastmessage", 0);
            return false;
        }

        fputs($fp, base64_encode($mail['auth_username'])."rn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 334) {
            self::runlog('SMTP', "($mail[server]:$mail[port]) USERNAME - $lastmessage", 0);
            return false;
        }

        fputs($fp, base64_encode($mail['auth_password'])."rn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 235) {
            self::runlog('SMTP', "($mail[server]:$mail[port]) PASSWORD - $lastmessage", 0);
            return false;
        }

        $email_from = $mail['from'];
    }

    fputs($fp, "MAIL FROM: <".preg_replace("/.*<(.+?)>.*/", "\1", $email_from).">rn");
    $lastmessage = fgets($fp, 512);
    if(substr($lastmessage, 0, 3) != 250) {
        fputs($fp, "MAIL FROM: <".preg_replace("/.*<(.+?)>.*/", "\1", $email_from).">rn");
        $lastmessage = fgets($fp, 512);
        if(substr($lastmessage, 0, 3) != 250) {
            self::runlog('SMTP', "($mail[server]:$mail[port]) MAIL FROM - $lastmessage", 0);
            return false;
        }
    }

    fputs($fp, "RCPT TO: <".preg_replace("/.*<(.+?)>.*/", "\1", $toemail).">rn");
    $lastmessage = fgets($fp, 512);
    if(substr($lastmessage, 0, 3) != 250) {
        fputs($fp, "RCPT TO: <".preg_replace("/.*<(.+?)>.*/", "\1", $toemail).">rn");
        $lastmessage = fgets($fp, 512);
        self::runlog('SMTP', "($mail[server]:$mail[port]) RCPT TO - $lastmessage", 0);
        return false;
    }

    fputs($fp, "DATArn");
    $lastmessage = fgets($fp, 512);
    if(substr($lastmessage, 0, 3) != 354) {
        self::runlog('SMTP', "($mail[server]:$mail[port]) DATA - $lastmessage", 0);
        return false;
    }

    $headers .= 'Message-ID: <'.gmdate('YmdHs').'.'.substr(md5($email_message.microtime()), 0, 6).rand(100000, 999999).'@'.$_SERVER['HTTP_HOST'].">{$maildelimiter}";

    fputs($fp, "Date: ".gmdate('r')."rn");
    fputs($fp, "To: ".$email_to."rn");
    fputs($fp, "Subject: ".$email_subject."rn");
    fputs($fp, $headers."rn");
    fputs($fp, "rnrn");
    fputs($fp, "$email_messagern.rn");
    $lastmessage = fgets($fp, 512);
    if(substr($lastmessage, 0, 3) != 250) {
        self::runlog('SMTP', "($mail[server]:$mail[port]) END - $lastmessage", 0);
    }
    fputs($fp, "QUITrn");
    return true;
  }
}
//emailui::sendmail('admin33@163.com', '你好哦', '非常感谢');

发送邮件, PHP