// Database connection by using PHP PDO
require_once("../config/db.php");
// File containing database connection credentials.
try {
    $dbh = new PDO("mysql:host=" . DB_HOST . ";dbname=" . DB_NAME, DB_USER, DB_PASS);
} catch (PDOException $e) {
    exit("Error: " . $e->getMessage());
}

// using this handler above.   
    // Get the userid
    $userid = intval($_GET['id']);
    $sql = "SELECT FirstName,LastName,EmailId,ContactNumber,Address,PostingDate,id from tblusers where id=:uid";
    //Prepare the query:
    $query = $dbh->prepare($sql);
    //Bind the parameters
    $query->bindParam(':uid', $userid, PDO::PARAM_STR);
    //Execute the query:
    $query->execute();
    //Assign the data which you pulled from the database (in the preceding step) to a variable.
    $results = $query->fetchAll(PDO::FETCH_OBJ);
        
    if ($query->rowCount() > 0)
    {
      //In case that the query returned at least one record, we can echo the records within a foreach loop:
      foreach ($results as $result)
      {
        // Print the rows.
        echo "<br>";
        echo htmlentities($result->FirstName);
        echo htmlentities($result->LastName);
      }
    } else {
        echo "No rows returned.";
    }