In what situations should copy/paste be used as a debugging technique in PHP programming?

Copy/paste can be used as a debugging technique in PHP programming when there are repetitive sections of code that need to be checked for errors or when refactoring code. It can also be useful when comparing similar blocks of code to identify discrepancies or faults. However, it is important to ensure that the copied code is thoroughly reviewed and modified as needed to prevent propagating bugs.

// Example of using copy/paste for debugging in PHP
$variable1 = 10;
$variable2 = 20;
$variable3 = 30;

// Copy and paste the following block to compare and debug similar sections of code
$sum1 = $variable1 + $variable2;
echo "Sum 1: " . $sum1;

$sum2 = $variable2 + $variable3;
echo "Sum 2: " . $sum2;