php 保留小数点后几位

#保留小数点后几位,不四舍五入
function formatNumber($number, $point = 2)
{if (false === ($pointPlace = strpos($number, '.'))){ return number_format($number, 2, '.', '');} else {$tmpArr = explode('.', $number);return $tmpArr[0].'.'.substr($tmpArr[1],0,$point);}
}#保留小数点后的几位数
function saveThreePoint($number,$point = 3)
{$format='%.'.$point.'f';return isset($number) ? sprintf($format, $number) : 0.0000;
}