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<?php
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class ZcNumberHelper {
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/**
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* 返回当前时间的字符串，以支持BC的系列方法
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*
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* @param integer $dec 精确到小数点后几位
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* @return string
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*/
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public static function microtimeFloat($scale = 3) {
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list($usec, $sec) = explode(' ', microtime());
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return bcadd($usec, $sec, $scale);
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}
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public static function numFormat($number, $decimals = 2) {
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return (float)number_format($number, $decimals, '.', '');
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}
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public static function percent($divisor, $denominator, $symbol = '%', $decimals = 2){
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if($denominator == 0 && $divisor == 0){
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return '0' . $symbol;
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}
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if($denominator == 0) {
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return '∞' . $symbol;
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}
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return self::numFormat(($divisor / $denominator) * 100, $decimals) . $symbol;
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}
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}
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