mailer.php

<?php 
session_start();
$city= $_SESSION['userDetails']['city'];

// if($_SESSION['loggedin']==true)
// {
//     $name= $_SESSION['userDetails']['name'];
//     $address= $_SESSION['userDetails']['address']; 
// }
    


use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'PHPMailer/Exception.php';
require 'PHPMailer/PHPMailer.php';
require 'PHPMailer/SMTP.php';

//Database Connection
$servername="localhost";
$username="root";
$password="";
$dbname="electrothon";

$conn=new mysqli($servername,$username,$password,$dbname);
$type=$_POST['type'];

if($conn-> connect_error)
{
    die("Connection failed".$conn-> connect_error);
}
else{
    $sql="SELECT email FROM donor WHERE type='$type' && dcity='$city'";
    $result=$conn->query($sql);
    if($result->num_rows>0)
        {
            while($row=$result->fetch_assoc()){
            $email=$row['email'];
            echo $email;
            sendMail($email);
            }
        }

}


// try{
function sendMail($email) {
    // Instantiation and passing `true` enables exceptions
    $mail = new PHPMailer(true);
    $name= $_SESSION['userDetails']['name'];
    $address= $_SESSION['userDetails']['address'];
    $type=$_POST['type'];


    //Fetch receiver's details

    // $rname=$_POST['rname'];
    // $number=$_POST['number'];
    // $type=$_POST['type'];
    //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->SMTPAuth   = true;                                   // Enable SMTP authentication
    $mail->Username   = 'Your e-mail here';                     // SMTP username
    $mail->Password   = 'Your password here';                               // SMTP password
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;         // Enable TLS encryption, `PHPMailer::ENCRYPTION_SMTPS` also accepted
    $mail->Port       = 587;                                    // TCP port to connect to

    //Recipients
    $mail->setFrom('no_reply@gmail.com');
    //$mail->addAddress('joe@example.net', 'Joe User');     // Add a recipient
    $mail->addAddress($email);               // Name is optional
    //$mail->addReplyTo('info@example.com', 'Information');
    //$mail->addCC('cc@example.com');
    //$mail->addBCC('bcc@example.com');

    // Attachments
    //$mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
    //$mail->addAttachment('/tmp/image.jpg', 'new.jpg');    // Optional name

    // Content
    $mail->isHTML(true);                                  // Set email format to HTML
    $mail->Subject = 'Blood needed urgently !';
    // $mail->Body    = $bgroup." blood needed urgently.Please contact ".$rname." at ".$number." as soon as possible.";
    $mail->Body    =$type." blood needed ugently in ".$name." hospital at ".$address." .Please contact them as soon as possible.";
    $mail->Body    = "Hello ! This is to inform you that ".$type." blood is required in ".$name." at ".$address." .Please donate as soon as possible.Thank You.";
    //$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    header('Location: blood_bank.php');
}
// }
//  catch (Exception $e) {
//     echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
// }
?>