[英]MySQLI echo data from database
I am creating a website and I am using mySqli to connect to the database. 我正在创建一个网站,并且正在使用mySqli连接到数据库。 For some reason when I try to echo the information from the database I am not getting anything returning.
由于某些原因,当我尝试从数据库中回显信息时,没有得到任何回报。 I need it to take a column from the table and display it on the page, this isn't happening.
我需要它从表中取出一列并显示在页面上,这是没有发生的。 I have asked someone else and they thought it was strange (we spent about 1 hour trying to fix it) so any help would greatly appreciated.
我问过其他人,他们认为这很奇怪(我们花了大约1个小时来修复它),因此任何帮助将不胜感激。
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<?php
ob_start();
session_start();
include_once 'dbconnect.php';
if(!isset($_SESSION['user'])) {
header("Location: index.php");
exit;
}
$condition = empty($_POST['sender']) || empty($_POST['reciever']);
if (!$condition) {
$name = $_POST['sender'];
$reciever = $_POST['reciever'];
$query = "UPDATE users SET userCoins = userCoins + 1 WHERE userName='Morgan'";
$res = $mysqli->query($query);
if ($res) {
$error = "Success!";
} else {
$error = "Something Went Wrong!";
echo "Error: ".$mysqli->error; // here you can check your errors
}
$sql= "SELECT * FROM users WHERE userId=".$_SESSION['user'];
$result = $mysqli->query($sql);
$userRow = $result->fetch_assoc();
if (!$userRow) {
die("userID {$_SESSION['user']} not found!");
}
}
?>
<!DOCTYPE html>
<html>
<?php header("Access-Control-Allow-Origin: http://www.py69.esy.es"); ?>
<head>
<title>ServiceCoin</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="assets/css/bootstrap.min.css" type="text/css" />
<link rel="stylesheet" href="scripts/home/index.css" />
</head>
<body>
<ul>
<li><a href="#" class="a">ServiceCoin.com(image)</a></li>
<li><a href="logout.php?logout" class="a">Sign Out</a></li>
<li><a href="#" class="a">Contact</a></li>
<li><a href="#" class="a">Get Service Coins</a></li>
<li><a href="#" class="a">News</a></li>
<li><a href="settings.php" class="a">Settings</a></li>
<li><a href="#" class="a">Referrals</a></li>
<li><a href="service.php" class="a">Services</a></li>
<li><a href="home.php" class="a">Home</a></li>
</ul>
<br /><br />
<center>
<h3>Welcome, <?php echo $userRow['userName']; ?>. You Currently Have <br /><br /><br /><br /><br /><span id="services"><?php var_dump($userRow) ?></span> Service Coins</h3>
<form method="post" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" autocomplete="off">
<div class="form-group">
<div class="input-group">
<span class="input-group-addon"><span class="glyphicons glyphicons-lock"></span></span>
<input type="text" name="sender" class="form-control" placeholder="Enter Your Wallet Key" maxlength="15" />
<span class="text-danger"><?php echo $error; ?></span>
</div>
<div class="input-group">
<span class="input-group-addon"><span class="glyphicons glyphicons-lock"></span></span>
<input type="text" name="reciever" class="form-control" placeholder="Enter The Recievers Wallet Key" maxlength="15" />
<span class="text-danger"><?php echo $error; ?></span>
</div>
</div>
<div class="form-group">
<button type="submit" class="btn btn-block btn-primary" name="send">Sign Up</button>
</div>
</form>
</center>
</body>
</html>
<?php ob_end_flush(); ?>
You're not executing the SELECT
query. 您没有执行
SELECT
查询。 You need: 你需要:
$sql= "SELECT * FROM users WHERE userId=".$_SESSION['user'];
$result = $mysqli->query($sql);
Then change: 然后更改:
$result->fetch_assoc();
to 至
$userRow = $result->fetch_assoc();
Then you can use things like $userRow['userName']
and $userRow['userCoins']
to show information about the user. 然后,您可以使用
$userRow['userName']
和$userRow['userCoins']
来显示有关用户的信息。
You should also check if the query found anything, like: 您还应该检查查询是否找到了任何东西,例如:
if (!$userRow) {
die("userID {$_SESSION['user']} not found!");
}
The code that performs the SELECT
query and sets $userRow
should not be in the if(!$condition)
block, so that you'll see the user information when you view the page before submitting the form. 执行
SELECT
查询并设置$userRow
不应位于if(!$condition)
块中,以便在提交表单之前查看页面时会看到用户信息。
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