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PHP Designing Interfaces in PHP Introducing Interfaces Implement MySQL RepositoryInterface

Kyle Peterson
Kyle Peterson
Courses Plus Student 2,118 Points

Can't create parameterized query.

The code I have commented out causes a fatal error. However, if I enter the table name directly instead of passing it, the code executes and displays all the information in the posts table. But when I check my work it says its incorrect and leaves an unhelpful hint...

"Bummer: Argument 1 passed to enroll() must be an instance of Student, string given</span></pre>"


class sqlRepository extends PDO implements RepositoryInterface
  public function __construct($dsn)
    try {
      //echo 'it worked';
    } catch (\PDOException $e) {
      echo $e->getMessage();
  public function all($table)
    // $stmt = $this->prepare('SELECT * FROM ?');
    // $stmt->bindValue(1, $table);
    // $stmt->execute();
    $stmt = $this->query("SELECT * FROM posts");
    $results = $stmt->fetchAll(PDO::FETCH_OBJ);
    return $results;