Question

php和sql新手。我必须在Netbeans上运行本地数据库（使用db浏览器创建）。

我的数据库连接正常，返回结果。但是当我通过界面编辑/更改结果时，它没有任何影响。我错过了什么吗？

这是我插入新条目的代码：

    <?php

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

    $pdo = new PDO('sqlite:events.db'); 

    if (isset($_POST['submit'])) {

    try {

      $sql = "INSERT INTO events (type, name) VALUES (:eventsType, :eventsName)";
      //named paramaters
      $stmt = $pdo->prepare($sql);

      $eventstype = filter_input(INPUT_POST, 'eventstype');
      $stmt->bindValue(':eventstype', $eventstype, PDO::PARAM_STR);

      $eventsName = filter_input(INPUT_POST, 'eventsName');
      $stmt->bindValue(':eventsName', $eventsName, PDO::PARAM_STR);

      //$movieRating = filter_input(INPUT_POST, 'movieRating');
      //$stmt->bindValue(':movieRating', $movieRating, PDO::PARAM_INT);

      $stmt->execute();
      $pdo = null;

      echo "<h1>Event added to database.</h1>";
      echo '<a href="index.php">Return to main menu</a>';

    } catch (PDOException $e) {
        //for development
        print "We had an error: " . $e->getMessage() . "<br/>";
        die();
    }
    ?>

    <?php } else {  ?>

    <form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post">
    Type: <input type="text" name="eventsType"><br>
    Name: <input type="text" name="eventsName"><br>
    //Rating: <input type="text" name="movieRating"><br>
    <input type="submit" name="submit">
    </form>

    <?php } ?>

这是用于更新条目：

    <?php

    $pdo = new PDO('sqlite:events.db');


    if (isset($_POST['submit'])) {

    try {


      $sql = "UPDATE events SET type = :eventsType, name =:eventsName WHERE id=:movieId";
      //named paramaters
      $stmt = $pdo->prepare($sql);

      $eventsId = filter_input(INPUT_POST, 'eventsId');
      $stmt->bindValue(':eventsId', $eventsId, PDO::PARAM_INT);

      $eventsType = filter_input(INPUT_POST, 'eventsType');
      $stmt->bindValue(':eventsType', $eventsType, PDO::PARAM_STR);

      /*$movieDescription = filter_input(INPUT_POST, 'movieDescription');
      $stmt->bindValue(':movieDescription', $movieDescription, PDO::PARAM_STR);*/

      /*$movieRating = filter_input(INPUT_POST, 'movieRating');
      $stmt->bindValue(':movieRating', $movieRating, PDO::PARAM_STR);*/

      $stmt->execute();
      $pdo = null;

      echo "<h1>Done</h1>";
      echo '<a href="index.php">Return to main menu</a>';


    } catch (PDOException $e) {
        print "We had an error: " . $e->getMessage() . "<br/>";
        die();
    }
    ?>



    <?php } else {
      try {

        $sql = "SELECT * FROM events WHERE id=:eventsId LIMIT 1";

        //named paramaters
        $stmt = $pdo->prepare($sql);

        $id = filter_input(INPUT_GET, 'id');
        $stmt->bindValue(':eventsId', $id, PDO::PARAM_INT);

        $stmt->execute();
        $r = $stmt->fetch(PDO::FETCH_ASSOC);
        $pdo = null;

        if (!$r){
          print "No events specified to update";
          exit();
        }

      } catch (PDOException $e) {
          print "We had an error: " . $e->getMessage() . "<br/>";
          die();
      }
      ?>



    <form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post">
    EventID: <input type="text" readonly name="movieId" value="<?= htmlspecialchars($r['id']); ?>"><br>
    Type: <input type="text" name="movieTitle" value="<?= htmlspecialchars($r['title'])?>"><br>
    Name: <input type="text" name="movieDescription" value="<?= htmlspecialchars($r['description']); ?>"><br>

    <input type="submit" name="submit" value="Update record" >
    </form>

    <?php } ?>

这是为了删除：

 <?php

$pdo = new PDO('sqlite:events.db');


if (isset($_POST['submit'])) {

if ( isset($_POST['confirm']) && $_POST['confirm'] == 'yes'){
  try {
    //better, but still need to do more checking for security
    $sql = "DELETE from events WHERE id=:eventId";
    //named paramaters
    $stmt = $pdo->prepare($sql);

    $eventsId = filter_input(INPUT_POST, 'eventsId');
    $eventsId = filter_input(INPUT_POST, 'eventsId', FILTER_SANITIZE_NUMBER_INT);
    $stmt->bindValue(':eventsId', $eventsId, PDO::PARAM_INT);

    $stmt->execute();
    $pdo = null;
    echo '<h1>Film has been removed from database</h1>';
    echo '<a href="index.php">Return to main menu</a>';

  } catch (PDOException $e) {
      print "We had an error: " . $e->getMessage() . "<br/>";
      die();
  }

} else {
  echo 'You need confirm.';

}


?>



<?php } else {
  try {

    $sql = "SELECT * FROM events WHERE id=:eventsId LIMIT 1";

    //named paramaters
    $stmt = $pdo->prepare($sql);

    $id = filter_input(INPUT_GET, 'id');
    $stmt->bindValue(':eventsId', $id, PDO::PARAM_INT);

    $stmt->execute();
    $r = $stmt->fetch(PDO::FETCH_ASSOC);
    $pdo = null;

    if (!$r){
      print "No film specified to update";
      exit();
    }

  } catch (PDOException $e) {
      print "We had an error: " . $e->getMessage() . "<br/>";
      die();
  }
  ?>



  Title:<?= htmlspecialchars($r['type'])?> <br>
  Desc:<?= htmlspecialchars($r['name']); ?> <br>
  Year:<?= htmlspecialchars($r['rating']); ?> <br>




<form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post">
<input type="text" readonly name="eventsId" value="<?= htmlspecialchars($r['id']); ?>"><br>
<input type="checkbox" name="confirm" value="yes">Yes, delete this record<br>
<input type="submit" name="submit" value="Delete record">
</form>

<?php } ?>

我不知道为什么它不起作用。它是uni的一个例子，并告诉我们改变。我表中的行是id，类型，名称和描述。

任何帮助都非常感激，因为我真的不知道发生了什么！

Answer 1

您可能会从pdo收到错误。

设置pdo's error mode以抛出异常....

$pdo = new PDO('sqlite:events.db',
               array(PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING));

或check your execute() methods for errors。

$stmt->execute() || die $stmt->errorInfo();

为什么我的SQL查询不会更改我的数据库？

1 个答案: