php auto mailer addAddress - php

Question

I want to send otp mail to user by fetching email value from database . I am using php auto mailer . It works when i use mail address directly but when i retrieve it from database i cant send it . Can anyone please help me with sending it .
function mailit()
{
$rand=rand(100000,999999);
$user=$_SESSION['user'];
$sql=mysqli_query($db,"UPDATE `doctor_login` SET `otp`='$rand' WHERE `doctor_id`='1'");
$mail = new PHPMailer;
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = ''; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'myusername '; // SMTP username
$mail->Password = 'mypassword'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587 ; // TCP port to connect to
$mail->setFrom('dont_reply_back#example.xyz');
$mail->addAddress('$row'); // Add a recipient
$mail->addReplyTo('dont_reply_back#example.xyz');
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'THis is your OTP';
$mail->Body = 'Your otp is '.$rand;
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
if(!$mail->send()) {
echo 'Message could not be sent.';
echo 'Mailer Error: ' . $mail->ErrorInfo;
}
}
Code for retrieving and displaying of email
$mailadd=mysqli_query($db,"SELECT `doctor_email` FROM `doctor_login` WHERE `doctor_id`='1'");
$row = mysqli_fetch_array($mailadd,MYSQLI_ASSOC);
echo $row['doctor_email'];
$row2=$rowa['doctor_email'];
echo $row2;
i have used both $row and $row2 in $mail->addAddress but doesnt seem to work . What changes can i do . it works whwn i give a specific address

Answer 1

I think this is a scope issue. If you are calling this code in the main body of the code
$mailadd=mysqli_query($db,"SELECT `doctor_email`
FROM `doctor_login`
WHERE `doctor_id`='1'");
$row = mysqli_fetch_array($mailadd,MYSQLI_ASSOC);
Then I assume you call mailit() after this, so pass the data you want to use as a parameter to the mailit() function so it is available inside the function scope.
function mailit($row)
{
$rand=rand(100000,999999);
$user=$_SESSION['user'];
$sql=mysqli_query($db,"UPDATE `doctor_login` SET `otp`='$rand' WHERE `doctor_id`='1'");
$mail = new PHPMailer;
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = ''; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'myusername '; // SMTP username
$mail->Password = 'mypassword'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587 ; // TCP port to connect to
$mail->setFrom('dont_reply_back#example.xyz');
$mail->addAddress($row['doctor_email']); // Add a recipient
$mail->addReplyTo('dont_reply_back#example.xyz');
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'THis is your OTP';
$mail->Body = 'Your otp is '.$rand;
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
if(!$mail->send()) {
echo 'Message could not be sent.';
echo 'Mailer Error: ' . $mail->ErrorInfo;
}
}
$mailadd=mysqli_query($db,"SELECT `doctor_email`
FROM `doctor_login`
WHERE `doctor_id`='1'");
$row = mysqli_fetch_array($mailadd,MYSQLI_ASSOC);
mailit($row);
You should have been getting errors from your original code so in future add the following:
ini_set('display_errors', 1);
ini_set('log_errors',1);
error_reporting(E_ALL);
// if you are using the `mysqli` API
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
to the top of your script. This will force any mysqli_ errors to generate an Exception that you can see on the browser as well as normal PHP errors.