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HomeBackend DevelopmentPHP TutorialHow to Round Up a Number to the Nearest Multiple of Five in PHP?

How to Round Up a Number to the Nearest Multiple of Five in PHP?

Round Up to Nearest Multiple of Five in PHP

When working with numbers in PHP, there may be instances where you need to round a number up to the nearest multiple of a specified value, such as five. While the built-in round() function can be used for general rounding purposes, it may not always provide the desired results.

To round up a number to the nearest multiple of five, you can employ different approaches based on your rounding convention. Here are three methods:

1. Round to the Next Multiple of 5 (Excluding the Current Number)

In this scenario, numbers lower than the multiple are rounded up to the next highest multiple. For example, 52 would round up to 55.

<code class="php">function roundUpToAny($n, $x = 5) {
    return round(($n + $x / 2) / $x) * $x;
}</code>

2. Round to the Nearest Multiple of 5 (Including the Current Number)

This method includes the current number in the rounding process. So, 52 would round up to 55, and 50 would remain unchanged.

<code class="php">function roundUpToAny($n, $x = 5) {
    return (round($n) % $x === 0) ? round($n) : round(($n + $x / 2) / $x) * $x;
}</code>

3. Round Up to an Integer, then to the Nearest Multiple of 5

This approach first rounds the number up to the nearest integer and then applies the rounding to the nearest multiple of five.

<code class="php">function roundUpToAny($n, $x = 5) {
    return (ceil($n) % $x === 0) ? ceil($n) : round(($n + $x / 2) / $x) * $x;
}</code>

By implementing any of these methods, you can effectively round a number up to the nearest multiple of five in PHP, ensuring the precision and consistency required in your calculations.

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