php两个表建立连接后怎样查询数据库2

发布网友发布时间：2023-10-10 15:01

共1个回答

热心网友时间：2024-11-19 06:37

<?php
$servername = "localhost";
$username = "root";
$password = "password";//你的mysql密码
$dbname = "myDB";//选择数据库

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出每行数据
    while($row = $result->fetch_assoc()) {
        echo "<br> id: ". $row["id"]. " - Name: ". $row["firstname"]. " " . $row["lastname"];
    }
} else {
    echo "0 results";
}
$conn->close();
?>

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