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phpmailer - Cannot modify header information - headers already sent in php mailer

问题描述

i am coding token based user password verification, when user click reset button,then password verification link is send to user email account, when user click verification link in there email then,user get login with there username and password,everything is all right in my code my message also be send,but this error message also generated in my new window page. i am sending this email locally throw xampp server.

php:

  <?php 
session_start();
require_once("db.php");
//if user click submit button
if(isset($_POST['submit']))
{
     //escape special charater in string first
    $email = $conn->real_escape_string($_POST['email']);

    // query to check if email already exists or not
    $sql = "SELECT email FROM user WHERE email='$email'";
    $result = $conn->query($sql);
    if($result->num_rows > 0)
    {
        $newToken = rand(100000000, 999999999);
        //encrypt the token
        $token = base64_encode(strrev(md5($newToken)));
        //$token = $newToken;
        //new register token
         $sql1 = "UPDATE user SET token='$token',tokenExpire=DATE_ADD(NOW(),INTERVAL 1 HOUR) WHERE email='$email'";
        if($conn->query($sql1) === TRUE)
        {
            //send mail
            require '../phpmailer/PHPMailerAutoload.php';
            if(!filter_var($email,FILTER_VALIDATE_EMAIL))
            {
            //SHOW ERROR MESSAGE
            }
            else
            {

             $mail = new PHPMailer(true);                              // Passing `true` enables exceptions

             //Server settings
             $mail->SMTPDebug = 2;                                 // Enable verbose debug output
             $mail->isSMTP();                                      // Set mailer to use SMTP
             $mail->Host = 'smtp.Gmail.com';                       // Specify main and backup SMTP servers

             $mail->SMTPOptions = array(
                  'ssl'=>array(
                   'verify_peer'=>false,
                   'verify_peer_name'=>false,
                    'allow_self_signed'=>true   
)                  
);
             $mail->SMTPAuth = true;                               // Enable SMTP authentication
             $mail->Username = 'luckynath4@gmail.com';                 // SMTP username
             $mail->Password = 'secretpassword';                           // SMTP password
             $mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
             $mail->Port = 587;                                    // TCP port to connect to

             //Recipients
             $mail->setFrom("luckynath4@gmail.com","Hiring Top");
             $mail->addAddress($email,"User");                       // Add a recipient


             //Content
             $mail->isHTML(true);                                  // Set email format to HTML
             $mail->Subject = 'Hiring Top-Password Reset Message';
             $mail->Body    = '<!DOCTYPE html>
              <html>
              <head>
                <title>Password Reset</title>
              </head>
              <body>
               Hi,<h3>'.$_POST['email'].'</h3>
                <p>We recieved a password reset request</p>
               <p> In order to reset your password, please click on the link below,</p>
                <p>if you did not make this request,you can ignore this mail.</p>
               <a href="http://localhost/practise/job_portal_theme/verify1.php?token='.$token.'&email='.$email.'">verify your password</a>
               <p>Thanks.</p><br />
               <p>message from Hiring Top team.</p>

              </body>
              </html>';
              if( $mail->send())
              {
                $_SESSION['checkEmail'] = true;
                header("Location:forgot_password.php");
                exit();
              }
              else
              {
                echo 'Mailer error: ' . $mail->ErrorInfo;
              } 

            }

        }
        else
        {
            //If data failed to insert then show that error.  
            echo "Error:" .$sql.$conn->error;
        }




    }
    else
    {
        //if email not found in database
        $_SESSION['emailNotFoundError']=true;
        header("Location:forgot_password.php");
        exit();
    }   

 $conn->close();
}
else
{
//redirect them back to forgot-password.php page if they didn't click Forgot Password button    
header("Location:forgot_password.php");
exit();
}
?>

标签： phpmailer

解决方案

发送标头前无输出

必须在进行任何输出之前调用发送/修改 HTTP 标头的函数。否则调用失败：

在此处查看详细信息

或者

尝试这个

使用window.location而不是header

echo "<script>window.location.assign('forgot_password.php')</script>";

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