SendOTP.php

<?php
$servername = "localhost";
$username = "";
$password = "";
$database  = "";

//Variables submitted by the users
$userToPost = $_POST["userToPost"];


// Create connection
$conn = new mysqli($servername, $username, $password, $database);
// Check connection
if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT email FROM users WHERE username = '" . $userToPost . "'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  // output data of each row
  while($row = $result->fetch_assoc()) {
    $userEmail = $row["email"];
  }
}

$sql = "SELECT otp FROM users WHERE username = '" . $userToPost . "'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  // output data of each row
  while($row = $result->fetch_assoc()) {
    $userVerificationOtp = $row["otp"];
  }
}

$hashedOTP = password_hash($userVerificationOtp, PASSWORD_DEFAULT);

ini_set( 'display errors', 1);
error_reporting(E_ALL);

$from = "[email protected]";
$to = $userEmail;

$subject = "OTP - Verification ( TOUR PUO V2 )";
$message = '

GEMENTAR TOUR PUO V2 EMAIL VERIFICATION
Click link below to verify

HIDDEN =' . $userEmail . '&otp=' . $hashedOTP . '
';
$headers = "From:" . $from;

mail($to,$subject,$message,$headers);


echo "The Email Message was successfully sent.";



$conn->close();
?>