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I need a PHP function that will take a float and round it down to the nearest half (x.0 or x.5). I found other functions that will round to the nearest fraction, but they round both ways.
The function I need can only round down.
7.778 -> 7.5
7.501 -> 7.5
7.49 -> 7.0
7.1 -> 7.0
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When rounding to the nearest half, round the fraction to whichever half the fraction is closest to on the number line. If a fraction is equally close to two different halves, round the fraction up. Here is a fraction. To figure out which value five-sixths is closest to, first think in terms of sixths.
The floor() function rounds a number DOWN to the nearest integer, if necessary, and returns the result. Tip: To round a number UP to the nearest integer, look at the ceil() function. Tip: To round a floating-point number, look at the round() function.
What's the correct way to round a PHP string to two decimal places? $number = "520"; // It's a string from a database $formatted_number = round_to_2dp($number); echo $formatted_number; The output should be 520.00 ; How should the round_to_2dp() function definition be?
$x = floor($x * 2) / 2; I'm assuming PHP has a floor function: floor($num * 2) / 2 ought to do it.
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