PHP PDO Database Query

phpPDOQuery.php

function dbQuery($conn, $sql='SELECT *', $params) {
  $queryTerms = explode(" ", $sql);
  $toBind = array();
  foreach ($queryTerms as $term) {
    if ($term[0] == ':') {
      array_push($toBind, $term);
    }
  }
  try {
    $stmt = $conn->prepare($sql);
    for ($i = 0; $i < count($toBind); $i++) {
      $stmt->bindValue($toBind[$i], $params[$i], PDO::PARAM_STR);
    }
    $stmt->execute();
    $results = $stmt->fetchAll();
    $stmt->closeCursor();
  } catch (PDOException $ex) {
    $errormessage = 'Sorry, there was an error with the database.';
    return false;
  }
  
  switch ($queryTerms[0]) {
    case 'SELECT':
    return $results;
    break;
  }
}