无法在命令行中更新Composer

Question

我正在更新作曲家，它显示了一些错误，如下所示。

使用软件包信息加载composer存储库 更新依赖关系（包括require-dev） 您的要求无法解决为一组可安装的软件包。

Problem 1
    - pusher/pusher-php-server v3.4.1 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - pusher/pusher-php-server v3.4.0 requires php >=5.4 <7.3 -> your PHP version (7.3.6) does not satisfy that requirement.
    - pusher/pusher-php-server v3.3.1 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - pusher/pusher-php-server v3.3.0 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - pusher/pusher-php-server 3.4.x-dev requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - Installation request for pusher/pusher-php-server ^3.3 -> satisfiable by pusher/pusher-php-server[3.4.x-dev, v3.3.0, v3.3.1, v3.4.0, v3.4.1].

  To enable extensions, verify that they are enabled in your .ini files:
    - C:\PHP7\php.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Answer 1

pusher v3不支持高于7.3的php版本

有一些选择：

第一个是将php降级到要求（不推荐），第二个是使用此命令将pusher升级到版本4

composer require pusher/pusher-php-server

Answer 2

请检查您在php中启用的curl使用； extension = php_curl.dll删除php.ini文件中的半冒号，然后尝试

Answer 3

尝试执行以下命令

使用以下命令安装第一个curl。

Excel.Worksheets

然后使用

sudo apt-get install curl