数据不是来自 mysql

Question

显示连接已经建立。但我不知道查询中的问题是什么。在该查询之后，我尝试回显一些内容，它在浏览器中可见。

<html>
    <head>

    </head>
<body>

<?php
$servername = "localhost:8888";
$username = "root";
$password = "";
$dbname = "employees";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}else {
    echo "Connected successfully";
}

$res = mysqli_query($conn,"select * from dept_manager");
echo"dept_manager";
while($row=mysqli_fetch_assoc($res))
{
?>
<table>
    <tr>
        <td><?php echo $row['emp_no'] ?></td>
        <td><?php echo $row['dept_no']?></td>
        <td><?php echo $row['from_date'] ?></td>
        <td><?php echo $row['to_date'] ?></td>  
    </tr>
</table>
<?php
}
?>
</body>
</html>

Answer 1

$sql = "select * from dept_manager";
$result = $conn->query($sql);
while($row = $result->fetch_assoc()){
      // your code here

}

试试这个..

Answer 2

试试这个代替 while 循环：

<?php
    $res = mysqli_query($conn,"select * from dept_manager");
    echo"dept_manager";
    echo "<table>";
    while($row=mysqli_fetch_assoc($res))
    {
     echo "<tr><td>" . $row['emp_no'] . "</td><td>" . $row['dept_no'] . "</td><td>" . $row['from_date'] . "</td><td>" . $row['to_date'] . "</td></tr>";
    }
echo "</table>";
?>

Answer 3

You have mentioned servername:localhost:8888 just check once remove 8888 and try.

我已经在我的本地系统中尝试使用您的代码，同样的代码工作正常。

我刚刚输入了我的数据库名称和 table 名称，它工作正常。

所以你就按照我的例子，测试一次就可以了。

编码：-

<html>
<head>
</head>
<body>

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "mydashboard";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 
else{
echo "Connected successfully";
}

$res = mysqli_query($conn,"select * from content_values");

while($row=mysqli_fetch_assoc($res))
{
?>
<table>
    <tr>
        <td><?php echo $row['name'] ?></td>
    </tr>
</table>
<?php
}
?>
</body>
</html>

输出：-

Connected successfully

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数据不是来自 mysql

Data is not coming from mysql

php

mysql

connection