What are the naming rules for PHP functions?

PHP function naming rules: 1. Camel case naming method, the first letter is lowercase, and the first letter of subsequent words is capitalized; 2. Use verbs or adjectives as function names to clearly describe the function; 3. Avoid using underscores or hyphens; 4. Use descriptive function names. Practical example: formatPhoneNumber function follows the above rules.

PHP function naming rules

PHP function naming rules help us write clear and readable code. Follow the following conventions to ensure that your function naming is efficient and consistent:

1. The first letter is lowercase, and the first letter of subsequent words is capitalized

Follow camel case naming, that is, the first letter Lowercase, capitalize the first letter of each subsequent word. For example:

function formatDate() {
    // ...
}

2. Use verbs or adjectives as function names

The function name should clearly explain the function of the function. Use verbs or adjectives to make it clear to the reader. For example:

function validateInput() {
    // ...
}

function isEmpty($value) {
    // ...
}

3. Avoid using underscores or hyphens

Underscores and hyphens can make function names difficult to read. Instead, use camelCase or Pascal nomenclature (the first letter of all words is capitalized).

4. Use descriptive function names

Avoid using function names that are too vague or lack description. For example, instead of using "doSomething()", use a more specific name that indicates exactly what the function does.

function calculateDueDate(DateTime $orderDate, int $daysToFulfill) {
    // ...
}

Practical case

The following is an example function that follows the PHP function naming rules:

function formatPhoneNumber(string $number): string
{
    // ...
    return $formattedNumber;
}

This function complies with the following rules:

• Use camel case naming (formatPhoneNumber)
• Use the verb (format) as the function name
• Avoid using underscores or hyphens
• Use descriptive function names, Clearly state what the function does

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