这篇文章主要介绍了php获取指定范围内最接近数的方法,可实现根据给定区间长度划分各个区间,并在其中寻找与给定数最接近的数,需要的朋友可以参考下
本文实例讲述了php获取指定范围内最接近数的方法。分享给大家供大家参考。具体实现方法如下:
- // Returns the next higher or lower number
- function NextRelatedNumber($number, $range){
- $r = $number % $range;
- $f = $number - $r;
- $b = round($r / $range, 0);
- return ($b == 1) ? $f + $range : $f;
- }
- // Returns the next higher number
- function NextHigherNumber($number, $range){
- $r = $number % $range;
- $f = $number - $r;
- $b = ceil($r / $range);
- return ($b == 1) ? $f + $range : $f;
- }
- // Returns the next lower number
- function NextLowerNumber($number, $range){
- $r = $number % $range;
- $f = $number - $r;
- $b = floor($r / $range);
- return ($b == 1) ? $f + $range : $f;
- }
- // Returns the next related number from an array
- function NextNumberArray($Number, $NumberRangeArray){
- $w = 0;
- $c = -1;
- $abstand = 0;
- $l = count($NumberRangeArray);
- for($pos=0; $pos < $l; $pos++){
- $n = $NumberRangeArray[$pos];
- $abstand = ($n < $Number) ? $Number - $n : $n - $Number;
- if ($c == -1){
- $c = $abstand;
- continue;
- }
- else if ($abstand < $c){
- $c = $abstand;
- $w = $pos;
- }
- }
- return $NumberRangeArray[$w];
- }
- // Examples
- // --------
- // 0 10 20 30 40 50 ...
- print 'NextRelatedNumber: ';
- print NextRelatedNumber(44, 10) . "/n";
- // returns --> 40
- // 0 20 40 60 80 100 ...
- print 'NextHigherNumber: ';
- print NextHigherNumber(41, 20) . "/n";
- // returns --> 60
- // 0 5 10 15 20 25 30 35 ...
- print 'NextLowerNumber: ';
- print NextLowerNumber(57, 5) . "/n";
- // returns --> 55
- // Example with Array
- print 'NextNumberArray: ';
- print NextNumberArray(45, array(3, 8, 19, 34, 56, 89)) . "/n";
- // returns --> 34
- // (45 is between 34 and 56 but 34 is the next)
希望本文所述对大家的php程序设计有所帮助。
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