8 命名规范_PHP
一个唯一命名空间的前缀总是全部小写的ASCII字母并且是一个顶级域名，通常是com，edu，gov，mil，net，org，或1981年ISO 3166标准所指定的标识国家的英文双字符代码。命名空间的后续部分根据不同机构各自内部的命名规范而不尽相同。这类命名规范可能以特定目录名的组成来区分部门(department)，项目(project)，机器(machine)，或注册名(login names)，也可以按功能模块来分类。
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How to add swap space on Ubuntu 22.04 LTS
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How to automatically generate a directory. How to set the format of the automatically generated directory.
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Variable naming conventions required in Python learning
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