php sql-server netbeans pdo insert-update

Error while updating php form information into sql server databases

I've created forms in php and want to update the data in the sql server database.

Following is my ad.php file.

<html>
<title>FORM</title>
<body><br><br>
<form action ="db_connection.php" method="post">
Activity:<input type="text" name="name"><br><br>
Units: <input id="number"><br><br>

<input type="submit" value="submit">
</form>

The data inserted in the above form should be updated in the table 'ad' of the database.

Following is my db_connection.php file:

<?php

class DB{
protected static $db;
const SERVER = "";
const SCHEMA = "";
const USER = "";
const PASS = "";
/*
 * Sets up the database connection
 * @return the database instance
 */
public static function databaseConnection(){
    if(!self::$db){
        try {

            $databse = "sqlsrv:server=" . self::SERVER . ";Database=" . self::SCHEMA;
            self::$db = new PDO($databse, DB::USER, DB::PASS);  
            self::$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );  
        } catch(PDOException $e){
            die("Error " . $e->getMessage());
        }   
    }
    return self::$db;
}

}


class ad{

  public function dbAdmin(vat $Activity, int $Units): bool {
    $conn = databaseConnection::getConnection();
    $conn->beginTransaction();
    $sql = "INSERT INTO ad('Activity', 'Units') VALUES (:Activity, :Units)";
    $stmt = $conn->prepare($sql);
    $stmt->bindParam(':Units', $Units);
    $stmt->bindParam(':Activity', $Activity);
    if ($stmt->execute()) {
        $conn->commit();
        return true;
    } else {
        $conn->rollback();
        return false;
    }
}
}

I'm getting a blank page after submitting the form and the database is not updating with the new data being submitted. Can you please check the code and help me with the corrections.

Solution

I had to reproduce this using Docker. The container "microsoft/mssql-server-linux" is being used.

I am using this extension **pdo_sqlsrv** and this driver https://breeto.id.au/2017/05/docker-alpine-linux-php-sql-server/

index.html

<!DOCTYPE>
<html>
<head>
    <title>FORM</title>
</head>
<body>
<br/>
<br/>
<form action="index.php" method="post">
    <label for="activity">Activity: </label>
    <input id="activity" type="text" name="activity">
    <br/>
    <br/>
    <label for="number">Units: </label>
    <input id="number" type="number" name="units">
    <br/>
    <br/>
    <input type="submit" value="submit">
</form>
</body>
</html>

index.php

<?php
declare(strict_types=1);

require_once __DIR__ . '/Db.php';
require_once __DIR__ . '/Ad.php';

error_reporting(E_ALL);
ini_set('display_errors', '1');
ini_set('display_startup_errors', '1');
ini_set('log_errors', '1');

$post = ['activity', 'units'];
if (!isset($_POST['activity'], $_POST['units'])) {
  header('Invalid form', TRUE, 422);
  exit;
}

$activity = filter_input(INPUT_POST, 'activity', FILTER_SANITIZE_SPECIAL_CHARS);
$units    = (int) filter_input(INPUT_POST, 'units', FILTER_SANITIZE_NUMBER_INT);
if (!is_int($units)) {
  header('A number must be given', TRUE, 422);
  exit;
}

$adTable = new Ad();
$adTable->dbAdmin($activity, $units);

echo '<h1>Done</h1>';
echo "<p>Activity: {$activity}</p>";
echo "<p>Units: {$units}</p>";

Db.php

<?php
declare(strict_types=1);


/**
 * Class Db
 */
class Db {

  protected static $db;

  public const SERVER = 'mssql';

  public const SCHEMA = 'stackoverflow';

  public const USER = 'sa';

  public const PASS = '';

  /**
   * Sets up the database connection
   *
   * @return \PDO
   */
  public static function databaseConnection(): \PDO {
    if (!self::$db) {
      try {
        $dsn      = 'odbc:Driver={FreeTDS};Server=' . self::SERVER . ';Database=' . self::SCHEMA . ';Port=1433';
        self::$db = new PDO($dsn, DB::USER, DB::PASS);
        self::$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      } catch (PDOException $e) {
        die('Error ' . $e->getMessage());
      }
    }
    return self::$db;
  }
}

Ad.php

<?php
declare(strict_types=1);


/**
 * Class Ad
 */
class Ad {

  public function dbAdmin(string $activity, int $units): bool {
    $conn = Db::databaseConnection();
    $conn->beginTransaction();
    $sql  = /** @lang TSQL */
      'INSERT INTO stackoverflow.dbo.ad (Activity, Units) VALUES (:Activity, :Units)';
    $stmt = $conn->prepare($sql);
    $stmt->bindParam(':Activity', $activity, PDO::PARAM_STR);
    $stmt->bindParam(':Units', $units, PDO::PARAM_INT);
    if ($stmt->execute()) {
      $conn->commit();
      return TRUE;
    }
    $conn->rollBack();
    return FALSE;
  }
}

SQL Server (Microsoft) Table

CREATE TABLE ad
(
  id       INT IDENTITY
    PRIMARY KEY,
  Activity VARCHAR(255),
  Units    INT
)
GO