What is the naming convention for PHP functions?

PHP function naming convention is camel case naming, following the following conventions: 1) Start with a verb or verb phrase; 2) Describe the function; 3) Use specific and meaningful words; 4) Avoid using abbreviations; 5) Keep concise.

PHP function naming convention

In PHP, function naming follows camelCase, which will Capitalize the first letter of a word, lowercase the remaining letters, and capitalize the first letter of each word. In addition, function names should follow the following convention:

• Start with a verb or verb phrase: For example, createFile(), calculateTax()
• Describe what the function does: The name should clearly indicate the purpose of the function and avoid using vague or general terms. For example, findProductById(), openConnection()
• Use specific and meaningful words: Avoid using abstract or general terms. For example, calculateDiscount() is better than computeValue()
• Avoid using abbreviations: Even if abbreviations are common, they should be avoided because they Can be difficult to understand or confusing. For example, generateUUID() is better than genUUID()
• Keep it simple: Function names should be as concise as possible while still being clearly descriptive its function.

Practical case:

// 正确示例：
function findUserById(int $userId): User|null {
    // 获取并返回指定 ID 的用户
}

// 错误示例：
function doSomething(int $userId): User|null {
    // 获取并返回指定 ID 的用户
}

In the error example, the function name doSomething() is ambiguous and does not accurately describe its function . It also violates the convention of beginning with a verb. The correct example uses the verb findUserById and provides specific information about what the function does.

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