PHP连接数据库并读取数据库中的内容

<?php
header("Content-type:text/html;charset=utf-8");
$servername = "服务器地址";//MySQL默认为localhost，端口号3306
$username = "用户名";
$password = "密码";
$dbname = "数据库名称";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$sql = "SELECT 列名1, 列名2 FROM 表";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "列名1: " . $row["列名1"]. " 列名2: " . $row["列名2"]."<br>";
    }
} else {
    echo "0 结果";
}
$conn->close();
?>

https://blog.csdn.net/qq_35008279/article/details/79252589