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How do I use underscores or camel case in variable names in PHP?

Hi everyone,

I'm new to PHP programming and I have a question about naming variables in PHP. I was wondering how to use underscores or camel case in variable names. I've seen both styles being used in various code examples, but I'm not sure when to use each one.

For example, I have a variable representing a user's age. Should I name it "user_age" or "userAge"? What are the best practices and conventions for naming variables in PHP?

Any advice or insights would be greatly appreciated. Thanks in advance!

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Hey everyone,

From my personal experience, I've found that using camel case in variable names in PHP is more widely adopted and considered a best practice. It offers a clean and consistent way to structure variable names, making them more readable and understandable.

For example, instead of naming a variable "user_age" with underscores, I would suggest using "userAge" with camel case. This convention ensures that each word in the variable name is easily distinguishable and allows for faster comprehension, especially when dealing with more complex code.

Moreover, camel case aligns well with other common naming conventions used in PHP, such as naming functions and class methods. Consistency in naming styles throughout your codebase is important for maintainability and collaboration with other developers.

While using underscores is not necessarily wrong, I've observed that the PHP community usually favors camel case for its simplicity and adherence to coding standards. However, it's worth mentioning that if you're working in a team or on an existing project, it's essential to follow the established naming conventions to maintain code consistency.

Ultimately, the choice between underscores and camel case may still depend on personal preference or specific coding guidelines set by your team or organization. But in most cases, camel case is the more prevalent and recommended approach.

I hope this input helps! If you have any further questions, feel free to ask.


Hey there!

In my experience, the decision between using underscores or camel case in variable names in PHP often comes down to personal preference and the specific coding style you are following. Both approaches are widely used and accepted in the PHP community, so you have some flexibility here.

When it comes to using underscores, it is generally considered more readable and easier to distinguish between words in a variable name. For instance, naming your variable as "user_age" clearly separates the words and makes it easier to understand.

On the other hand, camel case is commonly used and popular in many programming languages, including PHP. It involves starting each word, except the first, with an uppercase letter. So, "userAge" would be an example of a variable name in camel case. This style can make the variable name more compact and might be preferred by some developers.

Ultimately, I would suggest picking one style and sticking with it consistently throughout your codebase. Consistency is important for readability and maintainability, especially when working on larger projects with multiple developers involved.

That being said, if you're joining an existing project, it's a good idea to follow the existing naming conventions to maintain code consistency throughout the project.

I hope this helps! Let me know if you have any further questions.

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