我有一個可檢索多行資料的表單，每個項目都有一個文字區域，供使用者對特定項目發表評論。返回的項目數量是可變的，並且他們不必在任何/所有框中留下評論。
<textarea name="comment[]" cols="25" rows="2"><?php echo $f2; ?></textarea>
<input name="tableid[]" type="hidden" value="<?php echo $f1; ?>">
echo 語句用目前儲存在資料庫中的任何內容填滿文字區域，因為使用者可以修改其他人輸入的內容。
當它被傳遞到表單處理頁面時，它會傳回這個..
Submit: Submit
comment: Test Comment 1,Test Comment 2
tableid: 590,591
所以它似乎正確地傳遞了陣列。我正在使用此程式碼來更新資料庫
$conn = new PDO("mysql:host=xxxx;dbname=xxxxx",$username,$password);
$i = 0;
if(isset($_POST['submit'])) {
foreach($_POST['comment'] as $comment) {
$comment = $_POST['comment'][$i];
$id = $_POST['tableid'][$i];
$stmt = $conn->prepare("UPDATE reservations SET comment=:comment WHERE tableid=:id");
$stmt->bindValue(':comment', $comment, PDO::PARAM_INT);
$stmt->bindValue(':id', $id, PDO::PARAM_INT);
$stmt->execute();
$i++;
}
}
但是，這似乎根本沒有更新，我哪裡出錯了？
非常感謝
幾件事：
PDOException。這將使調試變得更加容易。程式碼：
$conn = new PDO("mysql:host=xxxx;dbname=xxxxx", $username, $password, [ PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, //Set PDO to fire PDOExceptions on errors. PDO::ATTR_EMULATE_PREPARES => false //Disable emulated prepares. Solves some minor edge cases. ]); //No need for incrementer. The index of the comment should be enough. if (isset($_POST['submit'])) { //Note the prepare on the outside. $stmt = $conn->prepare("UPDATE `reservations` SET `comment` = :comment WHERE `tableid` = :id"); //As well as the binding. By using bindParam, and supplying a variable, we're passing it by reference. //So whenever it changes, we don't need to bind again. $stmt->bindParam(":comment", $comment, PDO::PARAM_STR); $stmt->bindParam(":id", $id, PDO::PARAM_INT); foreach ($_POST['comment'] as $index => $comment) { //All that's left is to set the ID, see how we're reusing the $index of the comment input? $id = $_POST['tableid'][$index]; $stmt->execute(); } }PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC ); $conn = new PDO($dsn, $username, $password, $opt); $sql = "UPDATE reservations SET comment=? WHERE tableid= ?"; $stmt = $conn->prepare($sql); foreach ($_POST["comment"] as $id => $comment) { if ($comment) { $stmt->execute([$comment, $id]); } }