PHP使用SMTP邮件服务器发送邮件示例

本文实例讲述了PHP使用SMTP邮件服务器发送邮件。分享给大家供大家参考，具体如下：

用之前记得先去163注册一个邮箱，然后打开SMTP服务，当然也可以使用QQ邮箱等，但配置信息得改。

如图所示，开启QQ邮箱SMTP服务：

话不多说，直接上代码

email.class.php  定义发送邮件的库

<?phpclass smtp{  /* Public Variables */  var $smtp_port; //smtp_port 端口号  var $time_out;  var $host_name; //服务器主机名  var $log_file;  var $relay_host; //服务器主机地址  var $debug;  var $auth; //验证  var $user; //服务器用户名  var $pass; //服务器密码  /* Private Variables */  var $sock;  /* Constractor 构造方法*/  function smtp($relay_host = "", $smtp_port = 25, $auth = false, $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->host_name = "smtp.163.com"; //is used in HELO command    $this->log_file  = "";    $this->sock = FALSE;  }  /* Main Function */  function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")  {    $header  = "";    $mail_from = $this->get_address($this->strip_comment($from));    $body   = mb_ereg_replace("(^|(/r/n))(//.)", "//1.//3", $body);    $header .= "MIME-Version:1.0/r/n";    if ($mailtype == "HTML") { //邮件发送类型      //$header .= "Content-Type:text/html/r/n";      $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 . "/r/n";    // $header .= "From: $from<".$from.">/r/n";  //这里只显示邮箱地址，不够人性化    $header .= "Subject: " . $subject . "/r/n";    $header .= $additional_headers;    $header .= "Date: " . date("r") . "/r/n";    $header .= "X-Mailer:By (PHP/" . phpversion() . ")/r/n";    list($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))); //合并一个或多个数组    }    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 $this->smtp_error("sending HELO command");    }    #auth    if ($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", $address);    if (!@getmxrr($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 (!mb_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)  {    $comment = "//([^()]*//)";    while (mb_ereg($comment, $address)) {      $address = mb_ereg_replace($comment, "", $address);    }    return $address;  }  function get_address($address)  {    $address = mb_ereg_replace("([ /t/r/n])+", "", $address);    $address = mb_ereg_replace("^.*<(.+)>.*$", "//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;  }}?>