php 获取mysql大小

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 查询数据库大小
$sql = "SELECT table_schema AS 'Database', 
ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS 'Size (MB)' 
FROM information_schema.TABLES 
GROUP BY table_schema;";

$result = $conn->query($sql);

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