我有一个数据库，其中包含诸如useraccountid，userid，balance，totalwithdrawal，creationdate之类的用户数据。我已经完成了结构和代码，但一直没有给我任何答复，并且发件人帐户上的资金没有改变。
下面是处理交易的HTML表单
<div id="make-trans" class="col-xs-12">
<!-- PAGE CONTENT BEGINS-->
<div id="w2w" class="container jumbotron">
<h3 class="card-title center jumbotron1" style="background-color: #f88f20; color: #fff;"><i class="ace-icon fa fa-credit-card"></i> Wallet To Wallet</h3>
<form class="form-horizontal" action="" role="form" novalidate>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9">
<input type="text" name="userid" class="form-control" id="fname" placeholder="Agent Account ID">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9">
<input type='number' name='balance' class="form-control" id="sname" placeholder="Amount">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9 center">
<a href="wallet-to-wallet.php" type="submit" name="submit" class="outline-btn info">Transfer</a>
</div>
</div>
</form>
</div>
</div>
下面是处理交易的php代码
class TransactionDemo {
const DB_HOST = 'localhost';
const DB_NAME = 'trans';
const DB_USER = 'root';
const DB_PASSWORD = '';
public function transfer($from, $to, $amount) {
try {
$this->pdo->beginTransaction();
// get available amount of the transferer account
$sql = 'SELECT balance FROM useraccount WHERE userid=:from';
$stmt = $this->pdo->prepare($sql);
$stmt->execute(array(":from" => $from));
$availableAmount = (int) $stmt->fetchColumn();
$stmt->closeCursor();
if ($availableAmount < $amount) {
echo 'No money in your account';
return false;
}
// deduct from the transferred account
$sql_update_from = 'UPDATE useraccount
SET balance = balance - :balance
WHERE userid = :from';
$stmt = $this->pdo->prepare($sql_update_from);
$stmt->execute(array(":from" => $from, ":balance" => $amount));
$stmt->closeCursor();
// add to the receiving account
$sql_update_to = 'UPDATE useraccount
SET balance = balance + :balance
WHERE userid = :to';
$stmt = $this->pdo->prepare($sql_update_to);
$stmt->execute(array(":to" => $to, ":balance" => $balance));
// commit the transaction
$this->pdo->commit();
echo 'The amount has been transferred successfully';
return true;
} catch (PDOException $e) {
$this->pdo->rollBack();
die($e->getMessage());
}
}
/**
* Open the database connection
*/
public function __construct() {
// open database connection
$conStr = sprintf("mysql:host=%s;dbname=%s", self::DB_HOST, self::DB_NAME);
try {
$this->pdo = new PDO($conStr, self::DB_USER, self::DB_PASSWORD);
} catch (PDOException $e) {
die($e->getMessage());
}
}
/**
* close the database connection
*/
public function __destruct() {
// close the database connection
$this->pdo = null;
}
}
?>
现在我创建了一个transaction.php，并以action =“”的形式喜欢它，但是我没有收到任何错误，并且资金也没有动。
我在做什么错了？
答案 0 :(得分：0)
您在此href中添加了 wallet-to-wallet.php 。
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9 center">
<a href="wallet-to-wallet.php" type="submit" name="submit" class="outline-btn info">Transfer</a>
</div>
</div>
删除此代码或从 transaction.php 中移动代码，然后粘贴到 wallet-to-wallet.php 页面中。
答案 1 :(得分：-1)
* PHP MySQL Transaction Demo
*/
class TransactionDemo {
const DB_HOST = 'localhost';
const DB_NAME = 'transferfund';
const DB_USER = 'root';
const DB_PASSWORD = '';
/**
* Open the database connection
*/
public function __construct() {
// open database connection
$conStr = sprintf("mysql:host=%s;dbname=%s", self::DB_HOST, self::DB_NAME);
try {
$this->pdo = new PDO($conStr, self::DB_USER, self::DB_PASSWORD);
} catch (PDOException $e) {
die($e->getMessage());
}
}
/**
* PDO instance
* @var PDO
*/
private $pdo = null;
/**
* Transfer money between two accounts
* @param int $from
* @param int $to
* @param float $amount
* @return true on success or false on failure.
*/
public function transfer($from, $to, $balance) {
try {
$this->pdo->beginTransaction();
// get available amount of the transferer account
$sql = 'SELECT balance FROM useraccount WHERE userid=:from';
$stmt = $this->pdo->prepare($sql);
$stmt->execute(array(":from" => $from));
$availableAmount = (int) $stmt->fetchColumn();
$stmt->closeCursor();
if ($availableAmount < $balance) {
echo 'Insufficient amount to transfer';
return false;
}
// deduct from the transferred account
$sql_update_from = 'UPDATE useraccount
SET balance = balance - :balance
WHERE userid = :from';
$stmt = $this->pdo->prepare($sql_update_from);
$stmt->execute(array(":from" => $from, ":balance" => $balance));
$stmt->closeCursor();
// add to the receiving account
$sql_update_to = 'UPDATE useraccount
SET balance = balance + :balance
WHERE userid = :to';
$stmt = $this->pdo->prepare($sql_update_to);
$stmt->execute(array(":to" => $to, ":balance" => $balance));
// commit the transaction
if ($this->pdo->commit()) {
header("Location: ../wallet2wallet_success.php");
}else{
header("Location: ../wallet2wallet_error.php");
}
return true;
} catch (PDOException $e) {
$this->pdo->rollBack();
die($e->getMessage());
}
}
/**
* close the database connection
*/
public function __destruct() {
// close the database connection
$this->pdo = null;
}
}
// test the transfer method
$obj = new TransactionDemo();
// transfer from account 1 to 2
$from = isset($_POST["from"]);
$to = isset($_POST["to"]);
$balance = isset($_POST["balance"]);
$obj->transfer ($_POST["from"], $_POST["to"], $_POST["balance"]);
我能够通过上面的代码解决问题，谢谢您的贡献
<div id="w2w" class="container jumbotron">
<h3 class="card-title center jumbotron1" style="background-color: #f88f20; color: #fff; margin-top: -15px;"><i class="ace-icon fa fa-credit-card"></i> Wallet To Wallet</h3>
<form class="form-horizontal" action="ajax/makeTransaction.php" role="form" method = "POST">
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9">
<select id="inputState" type="number" class="form-control" name="from" class="form-control">
<option selected><?php echo $_SESSION['user_id']; ?></option>
</select>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9">
<input type="number" class="form-control" name="to" placeholder="Receiver Agent Account ID" value="">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9">
<input type='number' class="form-control" name="balance" placeholder="Amount" value="">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-9 center">
<button type="submit" name="transfer" class="outline-btn info">Transfer</button>
</div>
</div>
</form>
</div>