What are the ethical considerations when accessing and using source code from external websites in PHP?

When accessing and using source code from external websites in PHP, it is important to consider the ethical implications of using someone else's code without permission. It is crucial to respect the intellectual property rights of the original author and ensure that the code is used in accordance with any licenses or terms of use provided. Additionally, it is good practice to give proper attribution to the original author and to seek permission if necessary.

// Example of ethical use of external source code in PHP
// Make sure to check the license and terms of use before using the code

// Fetch external source code
$external_code = file_get_contents('https://www.example.com/external_code.php');

// Check if proper attribution is required
// Add attribution if necessary
echo $external_code;