Formulario dinámico

function formulario_dinamico($campos, $method, $action, $value) {
    $formulario = "<form action='$action' method='$method'>";
    
    foreach ($campos as $key => $value) {
        $formulario .= "<label for='$key'>$key</label><br>";
        $formulario .= "<input type='text' name='$key' value='$value'><br>";
    }
    $formulario .= "<input type='submit' value='Enviar'></form>";
    return $formulario;
}
$campos = array(
    "nombre" => "",
    "apellido" => "",
    "edad" => ""
);

echo formulario_dinamico($campos, "post", "index.php", "Enviar");