Скачать или смотреть Understanding the PHPDoc Standard for Function Attributes Passed by Reference

Learn how to properly document PHP functions with parameters passed by reference using `PHPDoc` standards for clear and effective code documentation.
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Understanding the PHPDoc Standard for Function Attributes Passed by Reference

In the world of PHP development, documenting code is just as crucial as writing it. Clear documentation not only helps in maintaining the code but also assists other developers in understanding its functionality. A common query that arises is whether there is a PHPDoc standard to describe function attributes that are passed by reference. Let’s delve into this topic to clarify how to properly document such functions.

The Problem: Documenting Parameters Passed by Reference

When you have a function in PHP that takes a parameter by reference, it can sometimes get tricky to accurately convey this in your documentation. Consider the following function:

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Here, the parameter $argumentPassedByReference is passed by reference, which means that any changes made to this parameter within the function will also affect the original variable used in the function call. This is a vital piece of information that needs to be clearly stated in the documentation.

The Conventional Approach to PHPDoc

A typical way to document parameters in PHPDoc is as follows:

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While this format provides a basic description, it fails to communicate the fact that the parameter is passed by reference. For developers reading the documentation, this could lead to misunderstanding how the parameter is treated within the function.

The Correct Method to Document Parameters Passed by Reference

To effectively highlight that a parameter is passed by reference, you can use the ampersand (&) in your PHPDoc comment just as you do in the function definition. Here’s how it should look:

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Key Elements of this Documentation Format:

Include the Ampersand: Placing the ampersand (&) before the parameter name in the documentation clearly indicates that the parameter is passed by reference.

Descriptive Comments: It’s important to include a brief description of the parameter’s purpose, which helps in maintaining clarity among users of your code.

Keep it Consistent: Use the same notation throughout your project to ensure consistency in how parameters are documented.

Conclusion

Being able to document function parameters properly is crucial for any PHP developer. Using the PHPDoc standard allows you to effectively communicate how parameters are handled in your functions, especially when they are passed by reference. By including the ampersand in both the function signature and the documentation comment, you ensure that your code remains clear and maintainable.

For all PHP developers, keeping your documentation up to date with such standards enhances collaboration and improves code quality.