Composer 安装 Laravel：无法将您的要求解析为一组可安装的软件包

Question

我第一次尝试使用 composer 安装 Laravel。

按照https://laravel.com/docs/5.1上的文档，我尝试使用命令sudo composer global require "laravel/installer" 。

我得到的输出粘贴在下面：

 Changed current directory to /home/israel/.composer Using version ^2.0 for laravel/installer ./composer.json has been created Loading composer repositories with package information Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages. Problem 1 - laravel/installer v2.0.1 requires ext-zip * -> the requested PHP extension zip is missing from your system. - laravel/installer v2.0.0 requires ext-zip * -> the requested PHP extension zip is missing from your system. - Installation request for laravel/installer ^2.0 -> satisfiable by laravel/installer[v2.0.0, v2.0.1]. To enable extensions, verify that they are enabled in those .ini files: - /etc/php/7.2/cli/php.ini - /etc/php/7.2/cli/conf.d/10-opcache.ini - /etc/php/7.2/cli/conf.d/10-pdo.ini - /etc/php/7.2/cli/conf.d/15-xml.ini - /etc/php/7.2/cli/conf.d/20-calendar.ini - /etc/php/7.2/cli/conf.d/20-ctype.ini - /etc/php/7.2/cli/conf.d/20-curl.ini - /etc/php/7.2/cli/conf.d/20-dom.ini - /etc/php/7.2/cli/conf.d/20-exif.ini - /etc/php/7.2/cli/conf.d/20-fileinfo.ini - /etc/php/7.2/cli/conf.d/20-ftp.ini - /etc/php/7.2/cli/conf.d/20-gettext.ini - /etc/php/7.2/cli/conf.d/20-iconv.ini - /etc/php/7.2/cli/conf.d/20-json.ini - /etc/php/7.2/cli/conf.d/20-mbstring.ini - /etc/php/7.2/cli/conf.d/20-phar.ini - /etc/php/7.2/cli/conf.d/20-posix.ini - /etc/php/7.2/cli/conf.d/20-readline.ini - /etc/php/7.2/cli/conf.d/20-shmop.ini - /etc/php/7.2/cli/conf.d/20-simplexml.ini - /etc/php/7.2/cli/conf.d/20-sockets.ini - /etc/php/7.2/cli/conf.d/20-sysvmsg.ini - /etc/php/7.2/cli/conf.d/20-sysvsem.ini - /etc/php/7.2/cli/conf.d/20-sysvshm.ini - /etc/php/7.2/cli/conf.d/20-tokenizer.ini - /etc/php/7.2/cli/conf.d/20-wddx.ini - /etc/php/7.2/cli/conf.d/20-xmlreader.ini - /etc/php/7.2/cli/conf.d/20-xmlwriter.ini - /etc/php/7.2/cli/conf.d/20-xsl.ini You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode. Installation failed, deleting ./composer.json.

这是否意味着未安装 PHP？

Answer 1

只需运行sudo apt-get install php7.2-zip && sudo apt-get install php-zip 。 之后，您将再次运行命令（ sudo composer global require "laravel/installer" ）。

它应该工作得很好。

它确实做到了。 :)

Answer 2

如果你试试

sudo apt-get install php7.2-zip

你遇到了错误：

sudo: apt-get: command not found

然后，改用自制软件试试：

brew install php

这对我有用。 希望它可以为某人节省几分钟额外的头疼:) 快乐编码！

Answer 3

看看 Laravel 的要求：

PHP >= 7.1.3
OpenSSL PHP Extension
PDO PHP Extension
Mbstring PHP Extension
Tokenizer PHP Extension
XML PHP Extension
Ctype PHP Extension
JSON PHP Extension

你认识他们吗？ 您的错误消息指出，您的环境不符合 PHP 版本和扩展，因此您必须先安装它们。 一旦您安装了正确的 PHP 版本和相应的扩展，composer 将能够根据需要安装 laravel。

希望这可以帮助！ :)