php：smtp方式或mail函数方式发送邮件

php实现的邮件发送类，二种方式：
smtp方式与mail函数方式。

代码：

<?php 
/**
* 邮件发送类
*/
Class sendmail{ 
    public $smtp_host; 
    public $smtp_port = 25; 
    public $smtp_user; 
    public $smtp_password; 
    public $from_name; 
    public $SendFromMail; 
    public $mail_to; 
    public $subject; 
    public $message; 
    public $headers = &#39;&#39;; 
    public $ContentType = &#39;html&#39;; 
    public $charset = &#39;windows-1251&#39;; 
    public $smtp_debug = true; 
    public $socket; 
    public $error; 
    public $SendMailVia  = &#39;smtp&#39;; 
     
  public function construct() 
    { 
            if($this->SendFromMail == &#39;&#39;){ 
               $this->SendFromMail = $this->smtp_user; 
            } 
    } 
     
    public function Send($mail_to = &#39;&#39;, $subject = &#39;&#39;, $message = &#39;&#39;) 
    { 
        if($mail_to!=&#39;&#39;){$this->mail_to = stripslashes($mail_to);} 
            if($subject!=&#39;&#39;){$this->subject = stripslashes($subject);} 
            if($message!=&#39;&#39;){$this->message = $message;} 
            $meilsArr = array_filter($this->GetMailAndNameArr()); 
            if(trim($this->mail_to)==&#39;&#39;){$this->error = &#39;Enter the recipient address&#39;; } 
            if($meilsArr == array()){$this->error = &#39;Please enter a valid recipient address&#39;; } 
            foreach ($meilsArr as $val) 
            { 
                $validEmail = $this->validEmail($val[2]); 
                if($validEmail) 
                { 
                  if($this->SendMailVia==&#39;smtp&#39;){ 
                      return $this->SMTPsend($mail_to = $val[2], $name_to = $val[1]); 
                    } 
                    else{ 
                      return $this->MAILsend($mail_to = $val[2], $name_to = $val[1]); 
                    }     
                } 
            } 
    } 
     
    public function MAILsend($mail_to, $name_to) 
    { 
    if($this->ContentType=="text"){ 
        $header="Content-Type: text/plain; charset=".$this->charset.""; 
      } 
        else{ 
        $header="Return-Path: ".$this->smtp_user."\n". 
      "Reply-To: ".$this->SendFromMail."\n". 
      "From: ".$this->from_name." <".$this->SendFromMail.">\n". 
      "Subject: ".$this->subject."\n". 
        "Content-Type: text/html; charset=".$this->charset."\n"; 
      } 
      if(mail("$name_to <$mail_to>",$this->subject,$this->message,$header)){ 
         return true; 
        }else{ 
         return false; 
        } 
  } 
     
    public function SMTPsend($mail_to, $name_to) 
    { 
            $SEND =   "Date: ".date("D, d M Y H:i:s") . "\r\n"; 
            $SEND .=   &#39;Subject: =?&#39;.$this->charset.&#39;?B?&#39;.base64_encode($this->subject)."=?=\r\n"; 
            if ($this->headers!=&#39;&#39;){ $SEND .= $this->headers."\r\n\r\n"; } 
      else 
      { 
         $SEND .= "Reply-To: ".$this->SendFromMail."\r\n"; 
         $SEND .= "MIME-Version: 1.0\r\n"; 
         $SEND .= "Content-Type: text/".$this->ContentType."; charset=\"".$this->charset."\"\r\n"; 
         $SEND .= "Content-Transfer-Encoding: 8bit\r\n"; 
         $SEND .= "From: \"".$this->from_name."\" <".$this->SendFromMail.">\r\n"; 
         $SEND .= "To: $name_to <$mail_to>\r\n"; 
         $SEND .= "X-Priority: 3\r\n\r\n"; 
      } 
      $SEND .=  $this->message."\r\n"; 
         
                $socket = fsockopen($this->smtp_host, $this->smtp_port, $errno, $errstr, 30); 
          if(!socket) 
            { 
          if($this->smtp_debug) $this->error = $errno." - ".$errstr; 
          return false; 
        } 
                 
                if (!$this->server_parse($socket, "220", LINE)){ return false; } 
                 
            fputs($socket, "HELO ".$this->smtp_host. "\r\n"); 
            if (!$this->server_parse($socket, "250", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Can not send HELO!</p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, "AUTH LOGIN\r\n"); 
            if (!$this->server_parse($socket, "334", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Can not find an answer to a request authorization.</p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, base64_encode($this->smtp_user) . "\r\n"); 
            if (!$this->server_parse($socket, "334", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Login authorization was not accepted by server!</p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, base64_encode($this->smtp_password) . "\r\n"); 
            if (!$this->server_parse($socket, "235", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>No password was not accepted as a true server! Authorization Error!</p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, "MAIL FROM: <".$this->smtp_user.">\r\n"); 
            if (!$this->server_parse($socket, "250", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Unable to send command MAIL FROM: </p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, "RCPT TO: <" . $mail_to . ">\r\n"); 
            if (!$this->server_parse($socket, "250", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Unable to send command RCPT TO: </p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, "DATA\r\n"); 
            if (!$this->server_parse($socket, "354", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Unable to send command DATA</p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, $SEND."\r\n.\r\n"); 
            if (!$this->server_parse($socket, "250", LINE)) { 
               if ($this->smtp_debug) $this->error = &#39;<p>Unable to send the message body. The letter was sent!</p>&#39;; 
               fclose($socket); 
               return false; 
            } 
            fputs($socket, "QUIT\r\n"); 
            fclose($socket); 
            return TRUE; 
    } 
       
    private function GetMailAndNameArr(){ 
        $mailingArr = array(); 
            $tos = preg_split("/;|,/",$this->mail_to); 
            $pregcode = &#39;/(.*?)<(.*?)>/i&#39;; 
            foreach($tos as $to) 
            { 
              if(preg_match(&#39;/(.*?)<(.*?)>/i&#39;,$to,$matches)) 
                { 
                  unset($matches[0]);     
                  $matches[1] = trim(str_replace(&#39;"&#39;,&#39;&#39;,$matches[1])); 
                  $matches[2] = trim($matches[2]); 
                  $mailingArr[] =$matches;  
                } 
                elseif(preg_match(&#39;/\b([A-Z0-9._%-]+)@([A-Z0-9.-]+\.[A-Z]{2,4})\b/i&#39;,$to,$matches2)) 
                { 
                     unset($matches[0]);     
                     $matches[1] = trim(str_replace(&#39;"&#39;,&#39;&#39;,$matches2[1])); 
                     $matches[2] = trim($matches2[0]); 
                     $mailingArr[] =$matches; 
                } 
            } 
            return $mailingArr; 
    } 
     
    private function server_parse($socket, $response, $line = LINE) { 
    while (substr($server_response, 3, 1) != &#39; &#39;) { 
          if (!($server_response = fgets($socket, 256))) { 
               if ($this->smtp_debug) $this->error = "<p>$line Problems sending mail! $response</p>"; 
               return false; 
          } 
    } 
    if (!(substr($server_response, 0, 3) == $response)) { 
           if ($this->smtp_debug) $this->error = "<p>$line Problems sending mail! $response</p>"; 
           return false; 
        } 
    return true; 
  } 
  function validEmail($email) 
  { 
    $isValid = true; 
    $atIndex = strrpos($email, "@"); 
      $msg = &#39;&#39;; 
    if (is_bool($atIndex) && !$atIndex) 
    { 
      $isValid = false; 
    } 
    else 
    { 
      $domain = substr($email, $atIndex+1); 
      $local = substr($email, 0, $atIndex); 
      $localLen = strlen($local); 
      $domainLen = strlen($domain); 
      if ($localLen < 1 || $localLen > 64){ 
                 $msg = &#39;local part length exceeded&#39;; 
         $isValid = false; 
      } 
      else if ($domainLen < 1 || $domainLen > 255){ 
                 $msg = &#39; domain part length exceeded &#39;; 
         $isValid = false; 
      } 
      else if ($local[0] == &#39;.&#39; || $local[$localLen-1] == &#39;.&#39;){ 
                 $msg = &#39; local part starts or ends with .&#39;; 
         $isValid = false; 
      } 
      else if (preg_match(&#39;/\\.\\./&#39;, $local)){ 
                 $msg = &#39;local part has two consecutive dots&#39;; 
         $isValid = false; 
      } 
      else if (!preg_match(&#39;/^[A-Za-z0-9\\-\\.]+$/&#39;, $domain)){ 
                 $msg = &#39;character not valid in domain part&#39;; 
         $isValid = false; 
      } 
      else if (preg_match(&#39;/\\.\\./&#39;, $domain)){ 
                 $msg = &#39;  domain part has two consecutive dots&#39;; 
         $isValid = false; 
      } 
      else if(!preg_match(&#39;/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\&#39;*+?^{}|~.-])+$/&#39;, str_replace("\\\\","",$local))){ 
                 $msg = &#39;  character not valid in local part unless local part is quoted&#39;; 
         if (!preg_match(&#39;/^"(\\\\"|[^"])+"$/&#39;,str_replace("\\\\","",$local))){ 
            $isValid = false; 
         } 
      } 
      if ($isValid && !(checkdnsrr($domain,"MX") || checkdnsrr($domain,"A"))){ 
                 $msg = &#39;  domain <b>&#39;.$domain.&#39;</b> not found in DNS&#39;; 
         $isValid = false; 
      } 
    } 
      $this->error = $msg; 
    return $isValid; 
  } 
} 
?>

调用示例：

<?php  
include "sendmail.class.php"; 
$Mail = new sendmail(); 
// Set congif 
$Mail->SendMailVia = &#39;smtp&#39;;  // Send via smtp server or mail function 
$Mail->smtp_host = &#39;mail.myhost.com&#39;; 
$Mail->smtp_port = 25; 
$Mail->smtp_user = &#39;user@myhost.com&#39;; 
$Mail->smtp_password = &#39;mypassw&#39;; 
// 例1 (mail from me) 
if($Mail->Send(&#39;mymail1@mydomain.com; recipient2 name <recipientmail2@mydomain.com>,"recipient name" <recipient@mail.com>&#39;,
&#39;My subject&#39;,&#39;My message here.&#39;)) 
{ 
  echo &#39;邮件已发送!&#39;; 
} 
else 
{ 
  echo $Mail->error; 
} 
// 例2 (mail from me) 
$Mail->mail_to = &#39;mymail1@mydomain.com; recipient2 name <recipientmail2@mydomain.com>,"recipient name" <recipient@mail.com>&#39;; 
$Mail->subject = &#39;My subject&#39;; 
$Mail->message = &#39;My message here&#39;; 
if($Mail->Send()) 
{ 
  echo &#39;邮件已发送!&#39;; 
} 
else 
{ 
  echo $Mail->error; 
} 
// 例3 (mail from another user: example user2@site2.com) 
$Mail->mail_to = &#39;Recipient Name <recipientmail@domain.com>&#39;; 
$Mail->subject = &#39;My subject&#39;; 
$Mail->message = &#39;My message here&#39;; 
$Mail->from_name = &#39;User2 Name&#39;; 
$Mail->SendFromMail = &#39;user2@site2.com&#39;; 
if($Mail->Send()) 
{ 
  echo &#39;message Mail send!&#39;; 
} 
else 
{ 
  echo $Mail->error; 
} 
?>

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