About the configuration settings of composer.json

The following tutorial column from composer will tell you about the configuration settings of composer.json. I hope it will be helpful to friends in need!

The value of the configuration file is key:val and must be wrapped in double quotes

# #1. Configuration file

Name nameThe package name consists of the user name and the warehouse name
Package version restrictions to request the Monolog package 1.0 .*. This means any version in the 1.0 development branch, or any version greater than or equal to 1.0 and less than 1.1 (>=1.0 8b3bb043a4262e736f1f51639dfa5b6d=1.0, >=1.0, 8aeaf7e3f7eb6ecdcf166f4926dd8a46等同于  使用包里的 lib\类文件---->类名

再次运行composer dump-autoload

如果您需要在多个目录中搜索相同的前缀，则可以将它们指定为数组：

"autoload": {
        　　"psr-4": { "Monolog\\": ["src/", "lib/"] }
  }

如果您想要有一个可以在任何命名空间中查找的备用目录，您可以使用一个空的前缀，如：

  "autoload": {
        　　"psr-4": { ""exclude" }
  }

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