dynamically setting email adress in phpMailer - php

Question

I'm having trouble when trying to set an email dynamically from a GET variable.
I've already tried converting to string, but I keep getting: "Mailer Error: You must provide at least one recipient email address."
$destinationEmail = $_GET["email"];
//$destinationEmail = (string)$_GET["email"]; ----> already tried this.
function sendEmail($pdf,$data){
$mail = new PHPMailer\PHPMailer\PHPMailer();
$mail->IsSMTP(); // enable SMTP
$mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for Gmail
$mail->Host = "smtp.gmail.com";
$mail->Port = 465; // or 587
$mail->IsHTML(true);
$mail->Username = "xxxxxx";
$mail->Password = "xxxx";
$mail->SetFrom("Noreply#email.com");
$mail->Subject = "Subject";
$mail->Body = "Hello";
$mail->AddAddress($destinationEmail);
$mail->addStringAttachment($pdf,"pdf.pdf");
if(!$mail->Send()) {
echo "Mailer Error: " . $mail->ErrorInfo;
} else {
echo "Message has been sent";
}
}
if ( $_GET["email"] ){
sendEmail($pdf,$data);
}
Any help will be highly appreciated. Thanks in advance!

Answer 1

The sendEmail() function doesn't know about the email address because that variable is out of scope. You need to pass the $destinationEmail variable to your sendEmail() function:
function sendEmail($pdf,$data,$destinationEmail){
...
}
And then add the email address to the function call:
if ( $_GET["email"] ){
sendEmail($pdf,$data,$destinationEmail);
}