php获取指定范围内最接近数的方法
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2023-08-12 13:58:50
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...
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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