What are the potential pitfalls of using copy and paste in PHP coding, as seen in the forum thread discussion?

One potential pitfall of using copy and paste in PHP coding is the risk of introducing errors or inconsistencies when making changes to the copied code. To avoid this issue, it is recommended to create reusable functions or classes for common functionality instead of duplicating code.

// Example of creating a reusable function
function calculateSum($num1, $num2) {
    return $num1 + $num2;
}

// Example of using the reusable function
$sum = calculateSum(10, 5);
echo $sum; // Output: 15