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Transfer-to.php
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Transfer-to.php
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<?php
include 'conn.php';
if (isset($_POST['submit'])) {
$from = $_GET['id'];
$to = $_POST['to'];
$amount = $_POST['amount'];
$sql = "SELECT * from user where id=$from";
$query = mysqli_query($conn, $sql);
$sql1 = mysqli_fetch_array($query); // returns array or output of user from which the amount is to be transferred.
$sql = "SELECT * from user where id=$to";
$query = mysqli_query($conn, $sql);
$sql2 = mysqli_fetch_array($query);
// constraint to check input of negative value by user
if (($amount) < 0) {
echo '<script type="text/javascript">';
echo ' alert("Oops! Negative values cannot be transferred")'; // showing an alert box.
echo '</script>';
}
// constraint to check insufficient balance.
else if ($amount > $sql1['Balance']) {
echo '<script type="text/javascript">';
echo ' alert("Bad Luck! Insufficient Balance")'; // showing an alert box.
echo '</script>';
}
// constraint to check zero values
else if ($amount == 0) {
echo "<script type='text/javascript'>";
echo "alert('Oops! Zero value cannot be transferred')";
echo "</script>";
} else {
// deducting amount from sender's account
$newbalance = $sql1['Balance'] - $amount;
$sql = "UPDATE user set Balance=$newbalance where id=$from";
mysqli_query($conn, $sql);
// adding amount to reciever's account
$newbalance = $sql2['Balance'] + $amount;
$sql = "UPDATE user set Balance=$newbalance where id=$to";
mysqli_query($conn, $sql);
$sender = $sql1['Name'];
$receiver = $sql2['Name'];
$sql = "INSERT INTO transaction(`sender`, `receiver`, `balance`) VALUES ('$sender','$receiver','$amount')";
$query = mysqli_query($conn, $sql);
if ($query) {
echo "<script> alert('Transaction Successful');
window.location='transactionhistory.php';
</script>";
}
$newbalance = 0;
$amount = 0;
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Transaction</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="css/table.css">
<link rel="stylesheet" type="text/css" href="css/navbar.css">
<style type="text/css">
button {
border: none;
background: lightblue;
}
button:hover {
background-color: blue;
transform: scale(1.1);
color: white;
}
</style>
</head>
<body style="background-color : lightgreen ;">
<?php
include 'navbar.php';
?>
<div class="container-fluid">
<h2 class="text-center pt-4" style="color : black;">Transaction</h2>
<?php
include 'conn.php';
$sid = $_GET['id'];
$sql = "SELECT * FROM user where id=$sid";
$result = mysqli_query($conn, $sql);
if (!$result) {
echo "Error : " . $sql . "<br>" . mysqli_error($conn);
}
$rows = mysqli_fetch_assoc($result);
?>
<form method="post" name="tcredit" class="tabletext"><br>
<div>
<table class="table table-striped table-condensed table-bordered">
<tr style="color : black;">
<th class="text-center">Id</th>
<th class="text-center">Name</th>
<th class="text-center">Email</th>
<th class="text-center">Balance</th>
</tr>
<tr style="color : black;">
<td class="py-2"><?php echo $rows['id'] ?></td>
<td class="py-2"><?php echo $rows['Name'] ?></td>
<td class="py-2"><?php echo $rows['E-mail'] ?></td>
<td class="py-2"><?php echo $rows['Balance'] ?></td>
</tr>
</table>
</div>
<br><br><br>
<label style="color : red;"><b>Transfer To:</b></label>
<select name="to" class="form-control" required>
<option value="" disabled selected>Choose</option>
<?php
include 'conn.php';
$sid = $_GET['id'];
$sql = "SELECT * FROM user where id!=$sid";
$result = mysqli_query($conn, $sql);
if (!$result) {
echo "Error " . $sql . "<br>" . mysqli_error($conn);
}
while ($rows = mysqli_fetch_assoc($result)) {
?>
<option class="table" value="<?php echo $rows['id']; ?>">
<?php echo $rows['Name']; ?> (Balance:
<?php echo $rows['Balance']; ?> )
</option>
<?php
}
?>
<div>
</select>
<br>
<br>
<label style="color : red;"><b>Amount:</b></label>
<input type="number" class="form-control" name="amount" required>
<br><br>
<div class="text-center">
<button class="btn mt-3" name="submit" type="submit" id="myBtn">Transfer</button>
</div>
</form>
</div>
<?php
include('footer.php');
?>
<script src="https://cdn.jsdelivr.net/npm/@popperjs/[email protected]/dist/umd/popper.min.js" integrity="sha384-q2kxQ16AaE6UbzuKqyBE9/u/KzioAlnx2maXQHiDX9d4/zp8Ok3f+M7DPm+Ib6IU" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js" integrity="sha384-pQQkAEnwaBkjpqZ8RU1fF1AKtTcHJwFl3pblpTlHXybJjHpMYo79HY3hIi4NKxyj" crossorigin="anonymous"></script>
</body>
</html>