What are the potential causes of the "Division by zero" error in PHP scripts?

Division by zero error in PHP scripts occurs when attempting to divide a number by zero, which is mathematically undefined. To avoid this error, it is important to check if the divisor is zero before performing the division operation.

$dividend = 10;
$divisor = 0;

if ($divisor != 0) {
    $result = $dividend / $divisor;
    echo "Result: " . $result;
} else {
    echo "Division by zero is not allowed.";
}