Untitled

<html>
  <body>

    <form action = "test.php" method = "post">;
      "Query to run (1)?" <input name = "input1" type = "text" /><br>
      "Query to run (2)?" <input name = "input2" type = "text" />
      <input type = "submit" name = 'submit' value = 'go'/>
    </form>

    <?php

    //we want all errors.
    error_reporting(E_ALL);
    ini_set('display_errors', 1);

    $host = 'localhost';
    $db   = 'hatchery';
    $user = 'hatchery';
    $pass = 'hatchery';
    $charset = 'utf8mb4';

    $dsn = "mysql:host=$host;dbname=$db;charset=$charset";

    $opt = [
        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        PDO::ATTR_EMULATE_PREPARES   => false,
    ];
    $pdo = new PDO($dsn, $user, $pass, $opt);

    //let's print the rows of a given sql
    function printRows($pdo, $sql, $query_index){
      if(empty($sql)){
        echo "<br>The query #{$query_index} is empty!<br>";
        return;
      }
      foreach ($pdo->query($sql) as $row) {
          var_dump($row);
        }
    }

    //did the user click the "submit" button?
    if(!empty($_POST['submit'])){
      //no sanitizize at all:
      printRows($pdo, $_POST['input1'],1);
      printRows($pdo, $_POST['input2'],2);
    }
  ?>
  </body>
</html>