How can PHP developers avoid common mistakes when handling variable assignments within loops?

When handling variable assignments within loops, PHP developers should be cautious of unintentionally overwriting variables on each iteration. To avoid this common mistake, developers can use the `unset()` function to clear the variable before reassigning a new value within the loop. 

$numbers = [1, 2, 3, 4, 5];
$sum = 0;

foreach ($numbers as $num) {
    unset($temp); // Clear the variable before reassigning
    $temp = $sum + $num;
    $sum = $temp;
}

echo $sum; // Output: 15

Keywords

PHP variable assignments loops errors best practices

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