Is it possible to selectively include specific lines or functions from a PHP file using include or require?

It is not possible to selectively include specific lines or functions from a PHP file using include or require directly. However, you can achieve this by restructuring your code into separate files with the specific lines or functions you want to include, and then include those individual files as needed.

// File: functions.php
function myFunction() {
    // Function code here
}

// File: index.php
require 'functions.php'; // Include the file with the specific function
myFunction(); // Call the specific function