Grav\Plugin\Admin\AdminBaseController::taskFilesSessionRemove PHP Метод

    public function taskFilesSessionRemove()
    {
        if (!$this->authorizeTask('save', $this->dataPermissions()) || !isset($_FILES)) {
            return false;
        }
        // Retrieve the current session of the uploaded files for the field
        // and initialize it if it doesn't exist
        $sessionField = base64_encode($this->grav['uri']->url());
        $request = \json_decode($this->post['session']);
        // Ensure the URI requested matches the current one, otherwise fail
        if ($request->sessionField !== $sessionField) {
            return false;
        }
        // Retrieve the flash object and remove the requested file from it
        $flash = $this->admin->session()->getFlashObject('files-upload');
        $endpoint = $flash[$request->sessionField][$request->field][$request->path];
        if (isset($endpoint)) {
            if (file_exists($endpoint['tmp_name'])) {
                unlink($endpoint['tmp_name']);
            }
            unset($endpoint);
        }
        // Walk backward to cleanup any empty field that's left
        // Field
        if (!count($flash[$request->sessionField][$request->field])) {
            unset($flash[$request->sessionField][$request->field]);
        }
        // Session Field
        if (!count($flash[$request->sessionField])) {
            unset($flash[$request->sessionField]);
        }
        // If there's anything left to restore in the flash object, do so
        if (count($flash)) {
            $this->admin->session()->setFlashObject('files-upload', $flash);
        }
        $this->admin->json_response = ['status' => 'success'];
        return true;
    }