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<?php |
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/** |
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* Class Numbers |
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* |
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* @link https://www.icy2003.com/ |
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* @author icy2003 <[email protected]> |
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* @copyright Copyright (c) 2017, icy2003 |
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*/ |
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namespace icy2003\php\ihelpers; |
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use icy2003\php\C; |
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use icy2003\php\I; |
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/** |
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* 数字处理 |
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*/ |
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class Numbers |
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{ |
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/** |
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* 比较两个任意精度的数字 |
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* |
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* @param string $number1 数字1 |
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* @param string $number2 数字2 |
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* @param integer $scale 精确度，默认精确到小数点后 2 位 |
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* |
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* @return boolean |
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*/ |
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public static function isEquals($number1, $number2, $scale = 2) |
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{ |
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return 0 === bccomp($number1, $number2, $scale); |
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} |
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/** |
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* 加载一些奇怪的常量 |
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* |
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* 我知道这些符号不好打，所以从注释里复制喽 |
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* |
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* @constant double π 圆周率 |
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* @constant double e 自然常数 |
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* @constant double γ 欧拉常数 |
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* @constant double φ 黄金比 |
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* @constant double c 光速 |
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* |
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* @return void |
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*/ |
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public static function load() |
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{ |
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I::def('π', M_PI); |
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I::def('e', M_E); |
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I::def('γ', M_EULER); |
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I::def('φ', (sqrt(5) - 1) / 2); |
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I::def('c', 2.99792458e8); |
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} |
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/** |
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* 获取数字在指定长度的位置 |
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* |
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* @param integer $number |
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* @param integer $length |
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* |
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* @return integer |
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*/ |
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public static function position($number, $length) |
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{ |
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while ($number < 0) { |
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$number += $length; |
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} |
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return $number % $length; |
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} |
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/** |
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* 转成字节数 |
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* |
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* - 支持数字和单位之间有空格 |
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* |
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* @param string $size 例如：10m、10M、10Tb、10kB 等 |
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* |
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* @return integer |
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*/ |
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public static function toBytes($size) |
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{ |
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$callback = function ($matches) { |
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$sizeMap = [ |
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'' => 0, |
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'b' => 0, // 为了简化正则 |
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'k' => 1, |
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'm' => 2, |
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'g' => 3, |
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't' => 4, |
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'p' => 5, |
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]; |
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return $matches[1] * pow(1024, $sizeMap[strtolower($matches[2])]); |
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}; |
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return preg_replace_callback('/(\d*)\s*([a-z]?)b?/i', $callback, $size, 1); |
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} |
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/** |
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* 字节数尽可能转成 k、m、g 等形式 |
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* |
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* - 支持小单位转大单位 |
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* |
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* @param integer $bytes |
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* |
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* @return string |
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*/ |
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public static function fromBytes($bytes) |
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{ |
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$bytes = self::toBytes($bytes); |
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$unit = array('b', 'kb', 'mb', 'gb', 'tb', 'pb'); |
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return @round($bytes / pow(1024, ($i = floor(log($bytes, 1024)))), 2) . ' ' . $unit[$i]; |
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} |
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/** |
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* 比较两个值（如：10m、10M、10Tb、10kB 等）的大小 |
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* |
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* - 0：相等，-1：左小于右，1：右小于左 |
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* |
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* @param string $size1 |
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* @param string $size2 |
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* |
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* @return integer |
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*/ |
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public static function compareSize($size1, $size2) |
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{ |
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$bytes1 = self::toBytes($size1); |
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$bytes2 = self::toBytes($size2); |
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return ($v = $bytes1 - $bytes2) == 0 ? 0 : intval(($v) / abs($v)); |
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} |
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/** |
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* 将某进制的字符串转化成另一进制的字符串 |
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* |
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* @see http://php.net/manual/zh/function.base-convert.php |
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* |
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* @param string $numberInput 待转换的字符串 |
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* @param string $fromBaseInput 起始进制的规则 |
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* @param string $toBaseInput 结束进制的规则 |
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* |
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* @return string |
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*/ |
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public static function baseConvert($numberInput, $fromBaseInput, $toBaseInput) |
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{ |
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if ($fromBaseInput == $toBaseInput) { |
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return $numberInput; |
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} |
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$fromBase = Strings::split($fromBaseInput); |
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$toBase = Strings::split($toBaseInput); |
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$number = Strings::split($numberInput); |
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$fromLen = Strings::length($fromBaseInput); |
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$toLen = Strings::length($toBaseInput); |
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$numberLen = Strings::length($numberInput); |
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$retval = ''; |
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if ($toBaseInput == '0123456789') { |
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$retval = 0; |
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for ($i = 1; $i <= $numberLen; $i++) { |
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$retval = bcadd($retval, bcmul(array_search($number[$i - 1], $fromBase), bcpow($fromLen, $numberLen - $i))); |
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} |
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return $retval; |
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} |
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if ($fromBaseInput != '0123456789') { |
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$base10 = self::baseConvert($numberInput, $fromBaseInput, '0123456789'); |
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} else { |
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$base10 = $numberInput; |
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} |
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if ($base10 < Strings::length($toBaseInput)) { |
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return $toBase[$base10]; |
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} |
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while ($base10 != '0') { |
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$retval = $toBase[bcmod($base10, $toLen)] . $retval; |
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$base10 = bcdiv($base10, $toLen, 0); |
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} |
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return $retval; |
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} |
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/** |
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* 进制转换 |
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* |
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* - 支持 2、8、10、16 进制之间转换 |
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* |
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* @param string $number |
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* @param integer $fromBase 2、8、10、16之间互转 |
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* @param integer $toBase 2、8、10、16之间互转 |
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* |
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* @return string |
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*/ |
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public static function base($number, $fromBase, $toBase) |
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{ |
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C::assertTrue(in_array($fromBase, [2, 8, 10, 16]), '原始进制必须为 2、8、10、16 之一'); |
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C::assertTrue(in_array($toBase, [2, 8, 10, 16]), '目标进制必须为 2、8、10、16 之一'); |
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$chars = '0123456789ABCDEF'; |
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return self::baseConvert($number, Strings::sub($chars, 0, $fromBase), Strings::sub($chars, 0, $toBase)); |
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} |
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/** |
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* 中文大写数字转成小写数字 |
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* |
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* @param string $number |
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* |
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* @return string |
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*/ |
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public static function toLowerChineseCase($number) |
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{ |
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return Strings::replace($number, [ |
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'零' => '〇', |
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'壹' => '一', |
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'贰' => '二', |
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'叁' => '三', |
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'肆' => '四', |
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'伍' => '五', |
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'陆' => '六', |
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'柒' => '七', |
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'捌' => '八', |
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'玖' => '九', |
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'拾' => '十', |
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'佰' => '百', |
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'仟' => '千', |
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'圆' => '元', |
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]); |
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} |
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/** |
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* 中文小写数字转成大写数字 |
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* |
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* @param string $number |
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* |
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* @return string |
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*/ |
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public static function toUpperChineseCase($number) |
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{ |
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return Strings::replace($number, [ |
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'〇' => '零', |
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'一' => '壹', |
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'二' => '贰', |
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'三' => '叁', |
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'四' => '肆', |
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'五' => '伍', |
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'六' => '陆', |
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'七' => '柒', |
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'八' => '捌', |
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'九' => '玖', |
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'十' => '拾', |
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'百' => '佰', |
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'千' => '仟', |
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'元' => '圆', |
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]); |
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} |
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} |
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icy2003 /
php
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