How can you efficiently round numbers to the nearest 10 in PHP without using unnecessary operations?

When rounding numbers to the nearest 10 in PHP, you can efficiently achieve this by dividing the number by 10, rounding it to the nearest integer, and then multiplying it back by 10. This approach eliminates unnecessary operations and simplifies the rounding process.

$number = 47;
$rounded_number = round($number / 10) * 10;
echo $rounded_number; // Output: 50