How can PHP code be optimized to avoid overwriting variables in loops, as seen in the provided example?

To avoid overwriting variables in loops, you can use a different variable name for each iteration of the loop. This can be achieved by appending a unique identifier to the variable name, such as the loop index. By doing so, you ensure that each iteration of the loop operates on a distinct variable, preventing any unintended overwriting.

// Original code with variable overwriting issue
$numbers = [1, 2, 3, 4, 5];
$result = 0;

foreach ($numbers as $number) {
    $result = $result + $number;
}

echo $result;

// Optimized code to avoid variable overwriting
$numbers = [1, 2, 3, 4, 5];
$result = 0;

foreach ($numbers as $index => $number) {
    $result = $result + $number;
}

echo $result;