This post uses PHP in examples, and links to existing code standards, but could easily apply to any language.
Every developer is different, and most believe that their way is THE way. Some have a Computer Science degree, some learnt on the job. Some have 20 years experience across multiple languages, while someone is on their first day with PHP as their first language. There are so many differences, but 1 commonality: shared code. Unless you run your own company, and will never have anyone edit your code, you need a standard so that all these different programmers with their diverse backgrounds are working in a common way.
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