我是php和mysql的新手。
我尝试通过html表单更新数据库中的记录。
我有一个工作的搜索页面和一个编辑页面,其中的链接中有$ _GET,这是我必须在数据库中编辑的元素的ID。
所有工作表格都会向我显示正确的数据,我可以在表格中对其进行编辑。但是当我单击编辑按钮时,出现此错误消息:
Error updating record: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1
我的编辑页面的php代码是这样的:
<?php
require('includes\dbconn.php');
require('includes\dbfunction.php');
session_start();
if(isset($_SESSION["username"])){
include('includes\theme\head.php');
include('includes\theme\topbar.php');
include('includes\theme\sidebar.php');
?>
<!-- !PAGE CONTENT! -->
<div class="w3-main" style="margin-left:300px;margin-top:43px;">
<div class="w3-container">
<div class="w3-row">
<div class="w3-col s12 l3">
<br>
<?php
//RICEVI DATI ARTICOLO DAL DATABASE
if(isset($_GET['art_id'])){
$sql = "SELECT * FROM articoli WHERE id =". $_GET['art_id'];
$result = $conn->query($sql);
$row = $result->fetch_assoc();
}
//AGGIORNA DATI ARTICOLO NEL DATABASE
if(isset($_POST['btn-aggiorna'])){
$codiceArt = $_POST['codicearticolo'];
$descrizioneArt = $_POST['nomearticolo'];
$barcodeArt = $_POST['barcode'];
$prezzoAcquistoArt = $_POST['prezzoacquisto'];
$prezzoVenditaArt = $_POST['prezzovendita'];
$quantitaArt = $_POST['quantita'];
$scontoArt = $_POST['sconto'];
$update = "
UPDATE articoli
SET codiceArticolo='$codiceArt'
, nomeArticolo='$descrizioneArt'
, barcode='$barcodeArt'
, prezzoAcquisto='$prezzoAcquistoArt'
, prezzoVendita='$prezzoVenditaArt'
, quantita='$quantitaArt'
, scontoPercentuale='$scontoArt'
WHERE id =". $_GET['art_id'];
if ($conn->query($update) === TRUE) {
?>
<script type="text/javascript">
window.location.href = 'articolomodificato.php';
</script>
<?php
} else {
echo "Error updating record: " . $conn->error;
}
}
?>
</div>
<div class="w3-col s12 l5">
<form class="w3-container" action="modificaarticolo.php" method="post">
<label class="w3-text-blue"><b>Codice articolo:</b></label>
<input class="w3-input w3-border" name="codicearticolo" type="text" value="<?php echo $row['codiceArticolo'];?>"><br>
<label class="w3-text-blue"><b>Descrizione articolo:</b></label>
<input class="w3-input w3-border" name="nomearticolo" type="text" value="<?php echo $row['nomeArticolo']; ?>"><br>
<label class="w3-text-blue"><b>Barcode:</b></label>
<input class="w3-input w3-border" name="barcode" type="text" value="<?php echo $row['barcode']; ?>"><br>
<label class="w3-text-blue"><b>Prezzo Acquisto:</b></label>
<input class="w3-input w3-border" name="prezzoacquisto" type="text" value="<?php echo $row['prezzoAcquisto']; ?>"><br>
<label class="w3-text-blue"><b>Prezzo Vendita:</b></label>
<input class="w3-input w3-border" name="prezzovendita" type="text" value="<?php echo $row['prezzoVendita']; ?>"><br>
<label class="w3-text-blue"><b>Quantità:</b></label>
<input class="w3-input w3-border" name="quantita" type="text" value="<?php echo $row['quantita']; ?>"><br>
<label class="w3-text-blue"><b>Sconto %:</b></label>
<input class="w3-input w3-border" name="sconto" type="text" value="<?php echo $row['scontoPercentuale']; ?>"><br>
<button class="w3-btn w3-blue" name="btn-aggiorna" type="submit">Modifica</button>
<a class="w3-btn w3-blue" href="/bk2/magazzino.php">Indietro<a>
</form>
</div>
<div class="w3-col s12 l3">
<br>
</div>
</div>
</div>
</div>
<?php
include('includes\theme\script.php');
?>
</body>
</html>
<?php
}
else{
header("location: accessonegato.php");
}
?>
我从错误消息中知道错误在我的查询代码中,但我不知道在哪里。我曾尝试过多次更改&_GET ['art_id']的位置,使之在查询的双引号内和之外,但注意工作。
答案 0 :(得分:1)
在调用页面时,您需要将ID添加到表单中,否则不会被传入
<form class="w3-container" action="modificaarticolo.php?art_id=<?php echo $row['id'];?>" method="post">
您可能需要更改$row['id']
才能使用正确的列名。
尽管这会引起轻微的问题,因为数据是从其中获取的
//RICEVI DATI ARTICOLO DAL DATABASE
if(isset($_GET['art_id'])){
,它在更新之前,因此您可能需要将此代码移到更新下方,以确保它检索到最新数据。