How can I insert multiple records in mysql using php ?

// Connect to the database
$conn = mysqli_connect("localhost", "username", "password", "database");

// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

// Define the values to be inserted
$values = array(
    array('John', 'Doe', 25),
    array('Jane', 'Smith', 30),
    array('Bob', 'Johnson', 40)
);

// Build the query
$query = "INSERT INTO mytable (firstname, lastname, age) VALUES ";

foreach ($values as $row) {
    $query .= "(?, ?, ?),";
}

// Remove the last comma from the query string
$query = rtrim($query, ",");

// Prepare the statement
$stmt = mysqli_prepare($conn, $query);

// Bind the parameters
mysqli_stmt_bind_param($stmt, 'ssi', $firstname, $lastname, $age);

// Iterate over the values and execute the statement
foreach ($values as $row) {
    $firstname = $row[0];
    $lastname = $row[1];
    $age = $row[2];

    if (!mysqli_stmt_execute($stmt)) {
        echo "Error: " . mysqli_stmt_error($stmt);
    }
}

// Close the statement and database connection
mysqli_stmt_close($stmt);
mysqli_close($conn);