Tip: Make sure the website designer’s contract/agreement for website design or maintenance services includes wording requiring the designer to document their work, especially for any customizations that are done. Designers should add comments to their code (Ex: PHP code, HTML code, CSS). This makes it easier for other designers and programmers who might also be looking at or working with the code. Website designers should document code because it will come in handy some time later when the designer works on the code again. Just a short phrase or reason describing why the edit was made can be very helpful and can save time.
I learned about documenting code in college while pursuing my Bachelor of Science degree and it is something I’ve always used.