Are there best practices for structuring PHP functions to optimize performance, such as separating rarely executed code into separate functions?

To optimize performance in PHP functions, it is recommended to separate rarely executed code into separate functions. This can help improve code readability, maintainability, and performance by reducing the amount of code that needs to be executed on each function call.

function frequentlyExecutedCode() {
    // Code that is executed frequently
}

function rarelyExecutedCode() {
    // Code that is executed rarely
}

// Call the frequently executed code function
frequentlyExecutedCode();