📅  最后修改于: 2022-03-11 14:44:51.461000             🧑  作者: Mango
$num = 42.0815;
function printFloatWithLeadingZeros($num, $precision = 2, $leadingZeros = 0){
$decimalSeperator = ".";
$adjustedLeadingZeros = $leadingZeros + mb_strlen($decimalSeperator) + $precision;
$pattern = "%0{$adjustedLeadingZeros}{$decimalSeperator}{$precision}f";
return sprintf($pattern,$num);
}
for($i = 0; $i <= 6; $i++){
echo "$i max. leading zeros on $num = ".printFloatWithLeadingZeros($num,2,$i)."\n";
}