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<?php
namespace Drupal\Core\Ajax;
/**
* AJAX command for updating the value of a hidden form_build_id input element
* on a form. It requires the form passed in to have keys for both the old build
* ID in #build_id_old and the new build ID in #build_id.
*
* The primary use case for this Ajax command is to serve a new build ID to a
* form served from the cache to an anonymous user, preventing one anonymous
* user from accessing the form state of another anonymous user on Ajax enabled
* forms.
*
* This command is implemented by
* Drupal.AjaxCommands.prototype.update_build_id() defined in misc/ajax.js.
*O
* @ingroup ajax
*/
class UpdateBuildIdCommand implements CommandInterface {
/**
* Old build id.
*
* @var string
*/
protected $old;
/**
* New build id.
*
* @var string
*/
protected $new;
/**
* Constructs a UpdateBuildIdCommand object.
*
* @param string $old
* The old build_id.
* @param string $new
* The new build_id.
*/
public function __construct($old, $new) {
$this->old = $old;
$this->new = $new;
}
/**
* {@inheritdoc}
*/
public function render() {
return [
'command' => 'update_build_id',
'old' => $this->old,
'new' => $this->new,
];
}
}