PHP を使用して .sql ファイルを MySQL に正常にインポートするにはどうすればよいですか?

<code class="php"><?php
// Name of the SQL file to import
$filename = 'dbbackupmember.sql';

// MySQL connection credentials
$hostname = 'localhost';
$username = 'root';
$password = '';
$database = 'test';

// Create a new MySQLi connection
$mysqli = new mysqli($hostname, $username, $password, $database);
if ($mysqli->connect_errno) {
    echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
    exit;
}

// Get the contents of the SQL file
$sql = file_get_contents($filename);

// Execute the SQL statements
$result = $mysqli->multi_query($sql);

// Check the execution status
if ($result) {
    echo "SQL file imported successfully.";
} else {
    echo "Error importing SQL file: " . $mysqli->error;
}

// Close the connection
$mysqli->close();
?></code>