实现如下的功能：
在一个指定的范围内返回上一个和下一个最接近的数字。
代码如下：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | <?php/*** 返回离当前数字最近的数* edit www.jb200.com*/function NextRelatedNumber($number, $range){ $r = $number % $range; $f = $number - $r; $b = round($r / $range, 0); return ($b == 1) ? $f + $range : $f; } // Returns the next higher numberfunction NextHigherNumber($number, $range){ $r = $number % $range; $f = $number - $r; $b = ceil($r / $range); return ($b == 1) ? $f + $range : $f; } // Returns the next lower numberfunction NextLowerNumber($number, $range){ $r = $number % $range; $f = $number - $r; $b = floor($r / $range); return ($b == 1) ? $f + $range : $f; } // Returns the next related number from an arrayfunction NextNumberArray($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 = $abstand; <a href="http://www.jb200.com/zt/continue/" target="_blank" class="infotextkey">continue</a>; } else if ($abstand < $c){ $c = $abstand; $w = $pos; } } return $NumberRangeArray[$w];} //调用示例 // 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 //带数组的例子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)?> |