How Can I Round Up to the Nearest Multiple of Five in PHP?

Round Up to Nearest Multiple of Five in PHP

In PHP, the round() function rounds a number to the nearest integer. However, when rounding to multiples of 5, specific rounding conventions may be desired. Here are three approaches to round up to the nearest multiple of five:

1. Round to the Next Multiple of 5

This method excludes the current number. For instance, roundUpToAny(52, 5) would output 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

This approach includes the current number when rounding. roundUpToAny(52, 5) would output 55, while roundUpToAny(50.25, 5) would output 50.

<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 method rounds up to an integer first, then applies the nearest multiple of five rounding. roundUpToAny(50.25, 5) would output 55.

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

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