PHP实现发送邮件的方法(基于简单邮件发送类)

<?php 
/*邮件发送类 
*功能：使用smtp服务器发送邮件 
*/ 
class smtp { 
 /* 全局变量 */ 
 var $smtp_port; 
 var $time_out; 
 var $host_name; 
 var $log_file; 
 var $relay_host; 
 var $debug; 
 var $auth; 
 var $user; 
 var $pass; 
 var $sock; 
 /* 构造函数 */ 
 function smtp($relay_host = "", $smtp_port = 25, $auth = false, $log_file="", $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 = $log_file; //邮件发送成功失败的日志记录文件  
  $this->sock = false; 
 } 
 function mail_encode($str) 
 { 
  //return '=?utf-8?b?'.base64_encode(mb_convert_encoding($str, "gbk", "utf-8")).'?='; 
  return "=?utf-8?b?".base64_encode($str)."?=";
 } 
 /* 主函数，发送邮件 */ 
 function sendmail($flag, $boundary, $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") { 
   if ($flag == 2) { 
    $header .= "content-type:multipart/mixed; boundary= $boundary\r\n"; 
   } else { 
    $header .= "content-type:text/html; charset=\"utf-8\" \r\n"; 
   } 
  } 
  $header .= "to: " . $to . "\r\n";   
  if ($cc != "") { 
   $header .= "cc: " . $cc . "\r\n"; 
  }  
  $header .= "from: $from<" . $from . ">\r\n"; 
  $subject = self::mail_encode($subject); 
  $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" ); 
  } 
  return $sent; 
 } 
 /* 私有函数 */ 
 function smtp_send($helo, $from, $to, $header, $body = "") { 
  if (! $this->smtp_putcmd ( "helo", $helo )) { 
   return $this->smtp_error ( "sending helo command" ); 
  } 
  if ($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 = ereg_replace ( "^.+@([^@]+){1}quot;, "\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}quot;, "\1", $address );
  return $address;
 }
 function smtp_debug($message) {
  if ($this->debug) {
   echo $message;
  }
 }
}
?>

<?php 
//文件全路径名称，文件名称 
function send_smtp_mail($file, $filename) { 
 require ("smtp_mail.php"); 
 date_default_timezone_set ( 'asia/shanghai' ); 
 $subject = date ( "y-m-d" ) . "邮件标题"; //邮件标题 
 $content = "邮件内容！"; //邮件内容 
 //$file = "/a/b/c.txt"; //附件 
 //$filename = "email_log.log"; //附件名称 
 $smtpserver = "服务器ip"; //smtp服务器 
 $smtpserverport = 25; //smtp服务器端口 
 $bcc = ""; //副收件人 
 //$smtpuser = ""; //smtp服务器的用户帐号 
 //$smtppass = ""; //smtp服务器的用户密码 
 $smtpmailfrom = "aaa@bbb.com"; //smtp服务器的用户邮箱,邮件发送者 
 $smtpemailto = "邮箱1，邮箱2，邮箱3"; //邮件接受者 
 $cc = ""; //抄送 
 $mailsubject = $subject; //邮件主题 
 $mailtype = "html"; //邮件格式（html/txt）,txt为文本邮件 
 $additional_headers = ""; 
 $smtplogfile = ""; //发送邮件的日志文件，如果没有就不记录 
 // 定义分界线 
 $boundary = uniqid ( "" ); 
 $headers = "content-type: multipart/mixed; boundary= $boundary\r\n"; 
 //附件类型 
 $mimetype = "application/unknown"; 
 // 打开文件 
 $fp = fopen ( $file, "r" ); 
 // 把整个文件读入一个变量 
 $read = fread ( $fp, filesize ( $file ) ); 
 //我们用base64方法把它编码 
 $read = base64_encode ( $read ); 
 //把这个长字符串切成由每行76个字符组成的小块 
 $read = chunk_split ( $read ); 
 fclose ( $fp ); //关闭文件 
 /* 邮件发送代码 */ 
 $flag = 1; //判断使用什么样的文件头1或2 
 if ($filename == "") { 
  //没有附件 
  $body = $content; 
 } else { 
  //有附件 
  $flag = 2; 
  if ($mailtype == "html") { 
   $body = "--$boundary\r\n"; //此必须\r\n 
   $body .= "content-type:text/html\r\n\r\n"; //此必须\r\n\r\n 
   $body .= "$content\r\n"; 
   $body .= "--$boundary\r\n"; 
   $body .= "content-type: $mimetype; name=$filename\r\n"; 
   $body .= "content-disposition: attachment; filename=$filename\r\n"; 
   $body .= "content-transfer-encoding: base64\r\n\r\n"; 
   $body .= "$read\r\n\r\n"; 
   $body .= "--$boundary--\r\n"; 
  } else { 
   $body = "--$boundary\r\n"; 
   $body .= "content-type: content-type: text/plain; charset=iso-8859-1\r\n\r\n"; 
   $body .= "content-transfer-encoding: 8bit\r\n\r\n"; 
   $body .= "$content\r\n\r\n"; 
   $body .= "--$boundary\r\n"; 
   $body .= "content-type: $mimetype; name=$filename\r\n\r\n"; 
   $body .= "content-disposition: attachment; filename=$filename\r\n\r\n"; 
   $body .= "content-transfer-encoding: base64\r\n\r\n"; 
   $body .= "$read\r\n\r\n"; 
   $body .= "--$boundary--\r\n"; 
  } 
 } 
 $mailbody = $body; //邮件内容 
 //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 = new smtp ( $smtpserver, $smtpserverport, false, $smtplogfile ); 
 //$smtp->debug = true;//是否显示发送的调试信息 
 if ($smtp->sendmail ( $flag, $boundary, $smtpemailto, $smtpmailfrom, $mailsubject, $mailbody, $mailtype, $cc, $bcc, $additional_headers )) { 
  echo ("发送成功"); 
 } else { 
  echo ("发送失败"); 
 } 
} 
?>