tp5 修改入口文件think改为index.php后访问报错

[8] ErrorException in Input.php line 44
Undefined index: argv


protected $interactive = true;

private $tokens;
private $parsed;

public function __construct($argv = null)
{
if (null === $argv) {
$argv = $_SERVER['argv'];
// 去除命令名
array_shift($argv);
}

$this->tokens = $argv;

$this->definition = new Definition();
}