For instance, the -f switch commonly used to tell a program to read a configuration file complicates the configuration because the file may override or supplement options given on the command line.

例如，- f开关通常用于告诉程序读取一个配置文件，这将因为该文件可能覆盖或者补充命令行上给出的选项而使处理变复杂。

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The code supplement in the Resources section has an example TeX file that showcases the above commands.

参考资料部分的代码补充说明包含具有以上命令的TeX文件示例。

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Thus, in these situations, it is necessary to supplement XJConf with the DOM extension in PHP, which provides an API to dynamically construct an XML tree and write it to a file.

因此，在这些情形下，需要在php中为XJConf补充DOM扩展，这个扩展可以提供API动态构建xml树并将它写入文件。

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