php获取指定范围内最接近数的方法
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：
//Returnsthenexthigherorlowernumber
functionNextRelatedNumber($number,$range){
$r=$number%$range;
$f=$number-$r;
$b=round($r/$range,0);
return($b==1)?$f+$range:$f;
}
//Returnsthenexthighernumber
functionNextHigherNumber($number,$range){
$r=$number%$range;
$f=$number-$r;
$b=ceil($r/$range);
return($b==1)?$f+$range:$f;
}
//Returnsthenextlowernumber
functionNextLowerNumber($number,$range){
$r=$number%$range;
$f=$number-$r;
$b=floor($r/$range);
return($b==1)?$f+$range:$f;
}
//Returnsthenextrelatednumberfromanarray
functionNextNumberArray($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;
}
elseif($abstand<$c){
$c=$abstand;
$w=$pos;
}
}
return$NumberRangeArray[$w];
}
//Examples
//--------
//01020304050...
print'NextRelatedNumber:';
printNextRelatedNumber(44,10)."\n";
//returns-->40
//020406080100...
print'NextHigherNumber:';
printNextHigherNumber(41,20)."\n";
//returns-->60
//05101520253035...
print'NextLowerNumber:';
printNextLowerNumber(57,5)."\n";
//returns-->55
//ExamplewithArray
print'NextNumberArray:';
printNextNumberArray(45,array(3,8,19,34,56,89))."\n";
//returns-->34
//(45isbetween34and56but34isthenext)
希望本文所述对大家的php程序设计有所帮助。