我的服务器正在运行Linux Red Hat

我的代码：

require_once('../smtp/class.PHPmailer.PHP');
//include("class.smtp.PHP"); // optional,gets called from within class.PHPmailer.PHP if not already loaded
$mail = new PHPMailer(true); // the true param means it will throw exceptions on errors,which we need to catch
$mail->IsSMTP(); // telling the class to use SMTP
try {
  $mail->SMTPDebug  = 0;                     // enables SMTP debug information (for testing)
  $mail->SMTPAuth   = true;                  // enable SMTP authentication
  $mail->SMTPSecure = "tls";                 // sets the prefix to the server
  $mail->Host       = "smtp.gmail.com";      // sets GMAIL as the SMTP server
  $mail->Port       = $port;                 // set the SMTP port for the GMAIL server  465 or 587
  $mail->Username   = $username;             // GMAIL username
  $mail->Password   = $password;             // GMAIL password

  // Add each email address
  foreach($emailTo as $email){ $mail->AddAddress(trim($email)); }
  if($cc!=''){ foreach($cc as $email){ $mail->AddCC(trim($email)); } }
  if($bcc!=''){ foreach($bcc as $email){ $mail->AddBCC(trim($email)); } }

  $mail->SetFrom($emailFrom,$emailName);
  $mail->AddReplyTo($emailFrom,$emailName);
  $mail->Subject = $subject;
  $mail->AltBody = 'To view the message,please use an HTML compatible email viewer!'; // optional - MsgHTML will create an alternate automatically
  $mail->MsgHTML($content);
 // $mail->AddAttachment('images/PHPmailer.gif');      // attachment
 // $mail->AddAttachment('images/PHPmailer_mini.gif'); // attachment

  $mail->Send();
  echo'1';exit();
} catch (PHPmailerException $e) {
  echo $e->errorMessage(); //Pretty error messages from PHPMailer
} catch (Exception $e) {
  echo $e->getMessage(); //Boring error messages from anything else!
}