How does the number of functions in a PHP file affect script performance?

Having a large number of functions in a PHP file can potentially impact script performance as each function adds overhead to the script execution. To improve performance, consider breaking up the functions into separate files or classes based on functionality. This can help in better organization of code and improve script performance by only loading the necessary functions when needed.

// Example of organizing functions into separate files

// functions1.php
function function1() {
    // Function logic
}

// functions2.php
function function2() {
    // Function logic
}

// main.php
include 'functions1.php';
include 'functions2.php';

function1();
function2();