我如何在Ubunutu上安装phalcon？

Question

我正在Ubuntu上安装Phalcon框架。我用Apache做网络服务器。我安装了phalcon和psr。我可以在输出phalcon和psr中找到phpinfo()：

在使用composer install时，我得到以下错误：

  Problem 1
    - The requested PHP extension ext-psr ^0.7 has the wrong version (1.0.0) installed. Install or enable PHP's psr extension.
  Problem 2
    - phalcon/devtools v4.0.3 requires vlucas/phpdotenv ^3.6 -> satisfiable by vlucas/phpdotenv[3.6.x-dev, v3.6.0, v3.6.1, v3.6.2, v3.6.3, v3.6.4, v3.6.5] but these conflict with your requirements or minimum-stability.
    - phalcon/devtools v4.0.2 requires vlucas/phpdotenv ^3.6 -> satisfiable by vlucas/phpdotenv[3.6.x-dev, v3.6.0, v3.6.1, v3.6.2, v3.6.3, v3.6.4, v3.6.5] but these conflict with your requirements or minimum-stability.
    - phalcon/devtools v4.0.1 requires vlucas/phpdotenv ^3.6 -> satisfiable by vlucas/phpdotenv[3.6.x-dev, v3.6.0, v3.6.1, v3.6.2, v3.6.3, v3.6.4, v3.6.5] but these conflict with your requirements or minimum-stability.
    - phalcon/devtools v4.0.0 requires vlucas/phpdotenv ^3.6 -> satisfiable by vlucas/phpdotenv[3.6.x-dev, v3.6.0, v3.6.1, v3.6.2, v3.6.3, v3.6.4, v3.6.5] but these conflict with your requirements or minimum-stability.
    - Installation request for phalcon/devtools ~4.0 -> satisfiable by phalcon/devtools[v4.0.0, v4.0.1, v4.0.2, v4.0.3].

原因何在？我需要添加其他命令吗？

Answer 1

问题1

我认为您从Ubuntu中本地安装了php-psr，而您的编写器请求版本0.7。您可以尝试先用apt remove php-psr卸载Ubuntu包。

问题2

再试一次，当问题1是固定的，它可能是一个依赖问题，因为第一个问题。