[英]Unable to edit record from a table PDO PHP
我有一個記錄列表，每個人都可以編輯。 每當用戶單擊“編輯”時，就會出現一個輸入掩碼，需要在其中輸入新數據以替換舊數據。 我使用PDO處理數據庫連接，我堅信問題是我無法更新現有表
這是我以前的帖子驗證和數據添加到數據庫表的鏈接
第一個代碼段創建一個表單，用戶可以在其中輸入一些數據。
<?php
error_reporting(-1);
ini_set('display_errors', 'On');
?>
<?php
$servername = "xxxx";
$username = "xxxx";
$password = "xxxxx";
$dbname = "xxxxx";
try {
$dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
?>
<?php
if ($_GET['action'] == 'edit') {
//retrieve the record's information
$sth = $dbh->prepare("
SELECT nome, cognome, indirizzo, civico, citta, prov
FROM tagesroma
WHERE id = ?
");
$sth->execute(array($_GET['id']));
} else {
//set values to blank
$nome = '';
$cognome = '';
$indirizzo = '';
$civico = 0;
$citta = '';
$prov = '';
}
?>
<html>
<head>
<meta charset="UTF-8">
<title><?php echo ucfirst($_GET['action']); ?> Tages</title>
<style type="text/css">
<!--
#error { background-color: #600; border: 1px solid #FF0; color: #FFF;
text-align: center; margin: 10px; padding: 10px; }
-->
</style>
</head>
<body>
<?php
if (isset($_GET['error']) && $_GET['error'] != '') {
echo '<div id="error">' . $_GET['error'] . '</div>';
}
?>
<form action="commit.php?action=<?php echo $_GET['action']; ?>&type=tages"
method="post" accept-charset="UTF-8">
<table>
<tr>
<td>Nome</td>
<td><input type="text" name= "nome" value="<?php echo !empty($_POST['nome']) ? $_POST['nome'] : ''; ?>"></td>
</tr><tr>
<td>Cognome</td>
<td><input type="text" name= "cognome" value="<?php echo !empty($_POST['cognome']) ? $_POST['cognome'] : ''; ?>"></td>
</tr><tr>
<td>Indirizzo</td>
<td><input type="text" name= "indirizzo" value="<?php echo !empty($_POST['indirizzo']) ? $_POST['indirizzo'] : ''; ?>"></td>
</tr><tr>
<td>Civico</td>
<td><input type="text" name= "civico" value="<?php echo !empty($_POST['civico']) ? $_POST['civico'] : ''; ?>"></td>
</tr><tr>
<td>Citta</td>
<td><input type="text" name= "citta" value="<?php echo !empty($_POST['citta']) ? $_POST['citta'] : ''; ?>"></td>
</tr><tr>
<td>Prov</td>
<td><input type="text" name= "prov" value="<?php echo !empty($_POST['prov']) ? $_POST['prov'] : ''; ?>"></td>
</tr><tr>
<td colspan="2" style="text-align: center;">
<?php
if ($_GET['action'] == 'edit') {
echo '<input type="hidden" value="' . $_GET['id'] . '" name="id" />';
}
?>
<input type="submit" name="submit"
value="<?php echo ucfirst($_GET['action']); ?>" />
</td>
</tr>
</table>
</form>
</body>
</html>
代碼的第二部分將驗證輸入的數據，並且僅當一切正確時，才會更新新數據
<?php
error_reporting(-1);
ini_set('display_errors', 'On');
?>
<?php
$servername = "xxx";
$username = "xxx";
$password = "xxxx";
$dbname = "xxxx";
try {
$dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
$sth = $dbh->prepare("use accessibilita");
?>
<?php
switch ($_GET['action']) {
case 'edit':
switch ($_GET['type']) {
case 'tages':
$error = array();
$nome = isset($_POST['nome']) ?
trim($_POST['nome']) : '';
if (empty($nome)) {
$error[] = urlencode('Si prega di inserire un nome.');
}
$cognome = isset($_POST['cognome']) ?
trim($_POST['cognome']) : '';
if (empty($cognome)) {
$error[] = urlencode('Si prega di inserire un cognome.');
}
$indirizzo = isset($_POST['indirizzo']) ?
trim($_POST['indirizzo']) : '';
if (empty($indirizzo)) {
$error[] = urlencode('Si prega di inserire un indirizzo.');
}
$civico = isset($_POST['civico']) ?
trim($_POST['civico']) : '';
if (empty($civico)) {
$error[] = urlencode('Si prega di inserire un numero civico.');
}
$citta = isset($_POST['citta']) ?
trim($_POST['citta']) : '';
if (empty($citta)) {
$error[] = urlencode('Si prega di inserire una citta valida.');
}
$prov = isset($_POST['prov']) ?
trim($_POST['prov']) : '';
if (empty($prov)) {
$error[] = urlencode('Si prega di inserire una provincia.');
}
if (empty($error)) {
$stmt = $dbh->prepare("UPDATE tagesroma SET nome=?, cognome=?, indirizzo=?, civico=?, citta=?, prov=? WHERE id=1");
$stmt->execute(array($nome, $cognome, $indirizzo, $civico, $citta, $prov));
} else {
header('Location:tages.php?action=edit&id=' . $_GET['id'] .
'&error=' . join($error, urlencode('<br/>')));
}
break;
}
break;
}
?>
<html>
<head>
<title>Commit</title>
<meta charset="UTF-8">
</head>
<body>
<p>Done!</p>
</body>
</html>
$errors = $stmt->errorInfo();
foreach ($errors as $error) {
echo $error ,'<br />';
}
您可以使用上面的代碼來查找錯誤
添加一些錯誤處理代碼。
您設置PDO :: ERRMODE_EXCEPTION，以便錯誤應引發異常。
這里
if (!empty($error)) {
header('Location:tages.php?action=edit&id=' . $_GET['id'] . '&error=' . join($error, urlencode('<br/>')));
exit;
}
try {
$stmt = $dbh->prepare("UPDATE tagesroma SET nome=?, cognome=?, indirizzo=?, civico=?, citta=?, prov=? WHERE id=1");
$stmt->execute(array($nome, $cognome, $indirizzo, $civico, $citta, $prov));
}
catch ( PDOException $e ) {
echo 'INSERT FAILED WITH: ' . $e->getMessage();
exit;
}
catch( Exception $ex ) {
echo 'Some other error ' . $ex->getMessage();
exit;
}
我已經在Web服務器上重新創建了您的代碼，它似乎可以按您的預期工作- 我唯一更改的是mysql的登錄信息 ； 我在您的表單中鍵入的任何內容都會更新id = 1的記錄，或者如果數據無效則生成錯誤消息。 顯然，我必須創建一個與您期望的模式匹配的數據庫，因此我只創建了除id外的所有字段作為VARCHAR（255）。
我有一些建議可以嘗試：
希望這可以幫助！
**編輯：與您交談后，請查看以下代碼，該代碼可以滿足您的要求（至少在我的服務器上）：
tages.php：
<?php
error_reporting(-1);
ini_set('display_errors', 'On');
?>
<?php
$servername = "localhost";
$username = "redacted";
$password = "redacted";
$dbname = "test";
try {
$dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
?>
<?php
if ($_GET['action'] == 'edit') {
//retrieve the record's information
$sth = $dbh->prepare("
SELECT nome, cognome, indirizzo, civico, citta, prov
FROM tagesroma
WHERE id = ?
");
$sth->execute(array($_GET['id']));
} else {
//set values to blank
$nome = '';
$cognome = '';
$indirizzo = '';
$civico = 0;
$citta = '';
$prov = '';
}
?>
$thisrecord=$sth->fetch(PDO::FETCH_ASSOC);
<html>
<head>
<meta charset="UTF-8">
<title><?php echo ucfirst($_GET['action']); ?> Tages</title>
<style type="text/css">
<!--
#error { background-color: #600; border: 1px solid #FF0; color: #FFF;
text-align: center; margin: 10px; padding: 10px; }
-->
</style>
</head>
<body>
<?php
if (isset($_GET['error']) && $_GET['error'] != '') {
echo '<div id="error">' . $_GET['error'] . '</div>';
}
?>
<!-- NOTICE THE ADDITION TO THE END OF THE action= TO PASS THE ID ON TO YOUR SCRIPT -->
<form action="commit.php?action=<?php echo $_GET['action']; ?>&type=tages&id=<?php echo $_GET["id"];?>"
method="post" accept-charset="UTF-8">
<table>
<tr>
<td>Nome</td>
<td><input type="text" name= "nome" value="<?php echo !empty($_POST['nome']) ? $_POST['nome'] : $thisrecord["nome"]; ?>"></td>
</tr><tr>
<td>Cognome</td>
<td><input type="text" name= "cognome" value="<?php echo !empty($_POST['cognome']) ? $_POST['cognome'] : $thisrecord["cognome"]; ?>"></td>
</tr><tr>
<td>Indirizzo</td>
<td><input type="text" name= "indirizzo" value="<?php echo !empty($_POST['indirizzo']) ? $_POST['indirizzo'] : $thisrecord["indirizzo"]; ?>"></td>
</tr><tr>
<td>Civico</td>
<td><input type="text" name= "civico" value="<?php echo !empty($_POST['civico']) ? $_POST['civico'] : $thisrecord["civico"]; ?>"></td>
</tr><tr>
<td>Citta</td>
<td><input type="text" name= "citta" value="<?php echo !empty($_POST['citta']) ? $_POST['citta'] : $thisrecord["citta"]; ?>"></td>
</tr><tr>
<td>Prov</td>
<td><input type="text" name= "prov" value="<?php echo !empty($_POST['prov']) ? $_POST['prov'] : $sth["prov"]; ?>"></td>
</tr><tr>
<td colspan="2" style="text-align: center;">
<?php
if ($_GET['action'] == 'edit') {
echo '<input type="hidden" value="' . $_GET['id'] . '" name="id" />';
}
?>
<input type="submit" name="submit"
value="<?php echo ucfirst($_GET['action']); ?>" />
</td>
</tr>
</table>
</form>
</body>
</html>
commit.php：
<?php
error_reporting(-1);
ini_set('display_errors', 'On');
?>
<?php
$servername = "localhost";
$username = "redacted";
$password = "redacted";
$dbname = "test";
try {
$dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
$sth = $dbh->prepare("use accessibilita");
?>
<?php
switch ($_GET['action']) {
case 'edit':
switch ($_GET['type']) {
case 'tages':
$error = array();
$nome = isset($_POST['nome']) ?
trim($_POST['nome']) : '';
if (empty($nome)) {
$error[] = urlencode('Si prega di inserire un nome.');
}
$cognome = isset($_POST['cognome']) ?
trim($_POST['cognome']) : '';
if (empty($cognome)) {
$error[] = urlencode('Si prega di inserire un cognome.');
}
$indirizzo = isset($_POST['indirizzo']) ?
trim($_POST['indirizzo']) : '';
if (empty($indirizzo)) {
$error[] = urlencode('Si prega di inserire un indirizzo.');
}
$civico = isset($_POST['civico']) ?
trim($_POST['civico']) : '';
if (empty($civico)) {
$error[] = urlencode('Si prega di inserire un numero civico.');
}
$citta = isset($_POST['citta']) ?
trim($_POST['citta']) : '';
if (empty($citta)) {
$error[] = urlencode('Si prega di inserire una citta valida.');
}
$prov = isset($_POST['prov']) ?
trim($_POST['prov']) : '';
if (empty($prov)) {
$error[] = urlencode('Si prega di inserire una provincia.');
}
if (empty($error)) {
$stmt = $dbh->prepare("UPDATE tagesroma SET nome=?, cognome=?, indirizzo=?, civico=?, citta=?, prov=? WHERE id=?"); // changed to WHERE id=?
$stmt->execute(array($nome, $cognome, $indirizzo, $civico, $citta, $prov,$_GET["id"])); // added $_GET["id"] to the end
} else {
header('Location:tages.php?action=edit&id=' . $_GET['id'] .
'&error=' . join($error, urlencode('<br/>')));
}
break;
}
break;
}
?>
<html>
<head>
<title>Commit</title>
<meta charset="UTF-8">
</head>
<body>
<p>Done!</p>
</body>
</html>
花一點時間看一下更改-事實證明，您的問題是，無論您選擇編輯哪個記錄，它總是編輯id = 1的記錄。 此更新的代碼將添加您缺少的位，以傳遞“當前正在編輯”記錄的ID。
進一步編輯 ：根據您的要求，我已經更改了tages.php，以顯示您在頂部的查詢結果。 您已經為$ sth設置了當前值或初始化了它們的應有值，並且還具有！empty？ 在那里-您所需要做的就是將兩者放在一起。
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