What are the requirements for describing function parameters in the PHP function documentation specification?

PHP documentation specification requires that function parameter descriptions include: 1. Name and type (basic or class); 2. Description (purpose, expected value); 3. Default value (if any); 4. Pass by reference (if any) ;5. Verification method; 6. Sample code; 7. Practical cases.

Function parameter description requirements in PHP function documentation writing specifications

PHP function documentation provides information on how the function is used and its expectations Input and output details. The description of function parameters is an important part of function documentation, which helps developers understand how to use the function.

Requirements:

• Parameter name and type: Each parameter must specify its name and type. Types can be basic types (such as int, string), or other PHP classes or interfaces.
• Description: Each parameter must have a brief description describing its purpose. The description should cover the expected value, range, and constraints of the parameter.
• Default value: If a parameter has a default value, it must be specified explicitly. The default value should be consistent with the expected input type.
• Pass by reference: If a parameter is passed by reference, this must be explicitly stated. This allows developers to understand how the function's output will change the incoming parameters.
• Validation: Should describe how the function validates the input, and any errors or exceptions thrown if validation fails.
• Example: Example code can be used to illustrate the expected usage of parameters. The example should show the valid range of parameter values ​​and the correct way to use the function.

Actual case:

/**
 * 计算两数的和
 *
 * @param int $num1 第一个数
 * @param int $num2 第二个数
 * @return int 和
 */
function sum(int $num1, int $num2): int
{
    return $num1 + $num2;
}

In this example:

• The parameter name is $num1 and $num2, both types are int.
• The description describes the purpose of the parameter, which is the two numbers to be added.
• The function returns a sum of type int.
• There is no default value.
• No reference is passed.
• No validation is performed on the input, but validation can be added as needed.

The above is the detailed content of What are the requirements for describing function parameters in the PHP function documentation specification?. For more information, please follow other related articles on the PHP Chinese website!