<?php//___{xf_num2en}________________________________________

//***說明:數值轉英文表示法

//===回傳:<string>

//---NN)數值FF)小數位

//============================================================

functionxf_num2en($NN,$FF=0){

//===[前置]========================================

if(!is_numeric($NN))return'';

($FF>2)and$FF=2;

$xn='';$xf='';

global$enws;

$enws=array(

0=>"zero",1=>"one",2=>"two",3=>"three",4=>"four",

5=>"five",6=>"six",7=>"seven",8=>"eight",9=>"nine",

10=>"ten",11=>"eleven",12=>"twelve",

13=>"thirteen",14=>"fourteen",15=>"fifteen",

16=>"sixteen",17=>"seventeen",18=>"eighteen",19=>"nineteen",

20=>"twenty",30=>"thirty",40=>"forty",50=>"fifty",

60=>"sixty",70=>"seventy",80=>"eighty",90=>"ninety");

//===[整數]========================================

$nk=floor($NN);

$cnt=0;

while($nk){

$n=$nk%1000;

if($n){

$x=xf_enNum4($n);

if($cnt==1)$xn=$x.'thousand'.$xn;

elseif($cnt==2)$xn=$x.'million'.$xn;

elseif($cnt==3)$xn=$x.'billion'.$xn;

elseif($cnt==4)$xn=$x.'trillion'.$xn;

else$xn=$x;

}

$cnt+=1;

$nk=floor($nk/1000);

}//--while

//===[小數]========================================

if($FF>0){

$n=floor($NN*100)%100;

($n)and$xf=xf_enNum4($n).'cent';

}

return$xn.$xf;

}//--xf_num2en

functionxf_enNum4($NN){

global$enws;

$ans='';

$n=floor($NN/100);

($n)and$ans=$enws[$n].'hundred';

$n=$NN%100;

if($n){

if($n<20)$ans.=$enws[$n].'';

else{

$m=floor($n/10)*10;

$ans.=$enws[$m].'';

$n=$n%10;

($n)and$ans.=$enws[$n].'';

}

}

return$ans;

}//--xf_enNum4?>