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What is the naming convention for constants in PHP?

Hey everyone,

I hope you're all doing great. I need some help regarding naming conventions for constants in PHP. I've been working on a project and I want to make sure I'm following the best practices.

From what I understand, constants are declared using the "define" function in PHP and are typically written in uppercase letters. But I'm a bit confused about how to separate words within the constant name. Should I use underscores like "MY_CONSTANT" or is it more common to use camel case like "MyConstant"?

I want to make sure I'm following the standard conventions, so if anyone could provide some guidance or share any personal preferences, I would really appreciate it. Thanks in advance for your help!

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Hey there!

In my personal experience, I tend to use underscores to separate words in constant names in PHP. So, I typically go with the naming convention "MY_CONSTANT" for consistency and readability. Using underscores makes it easier to differentiate between words, especially when the constant name is a combination of multiple words.

Following this convention has helped me and my team maintain a clean and organized codebase, making it easier for others to understand and work with the code. It also aligns with the naming conventions used in other programming languages for constants.

However, I believe there might be personal preferences or project-specific conventions that others might follow. So, I'm curious to hear about other users' experiences and if there are any alternative conventions worth considering. Feel free to share your thoughts!


Hello everyone,

In my personal experience, I prefer to use the underscore convention when naming constants in PHP. I find it helps to improve the readability and maintainability of my code, especially when working on projects with multiple developers.

Using underscores, such as "MY_CONSTANT", allows for clear word separation and enhances code comprehension, particularly for longer constant names. It also aligns with widely adopted naming conventions, making the code more consistent and easy to understand for others who might review or work on the project in the future.

However, it's important to note that consistency within a project is key. If you're working with an existing codebase or a team that follows a different naming convention, it's generally best to stick with that convention to maintain consistency across the codebase.

Ultimately, the choice of naming convention for constants in PHP may vary based on personal preference and the requirements of your particular project. It's always a good idea to discuss and agree upon a naming convention with your team to ensure a unified approach.

I'm curious to hear about other users' experiences and opinions on this matter. Please feel free to share your thoughts!


Hey folks,

In my personal experience, I lean towards using camel case for naming constants in PHP. Instead of underscores, I prefer to capitalize the first letter of each word within the constant name. For example, I would go with "myConstant" instead of "MY_CONSTANT".

Why do I prefer this approach? Well, camel case provides a slight advantage in terms of readability and can make the constant names appear more natural and in line with regular variable naming conventions in PHP. Additionally, it helps to differentiate constants from other types of variables, such as regular variables or function names, which can enhance code clarity.

That said, I understand that naming conventions can vary between projects and teams. It ultimately depends on the specific style guide or standard being followed. So, it's always a good idea to check if your project has any predefined naming conventions or discuss with your team about their preferences.

I'd love to hear other users' experiences with naming constants in PHP and which convention they believe works best. Let's keep the discussion going!

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