<?php

$nwords = array( "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty", 30 => "thirty", 40 => "forty", 50 => "fifty", 60 => "sixty", 70 => "seventy", 80 => "eighty", 90 => "ninety" );

function int_to_words($x) {
 global $nwords;

 if(!is_numeric($x))
  $w = '#';
 else if(fmod($x, 1) != 0)
  $w = '#';
 else {
  if($x < 0) {
    $w = 'minus ';
    $x = -$x;
  } else
    $w = '';
  // ... now $x is a non-negative integer.

  if($x < 21) // 0 to 20
    $w .= $nwords[$x];
  else if($x < 100) { // 21 to 99
    $w .= $nwords[10 * floor($x/10)];
    $r = fmod($x, 10);
    if($r > 0)
     $w .= '-'. $nwords[$r];
  } else if($x < 1000) { // 100 to 999
    $w .= $nwords[floor($x/100)] .' hundred';
    $r = fmod($x, 100);
    if($r > 0)
     $w .= ' and '. int_to_words($r);
  } else if($x < 1000000) { // 1000 to 999999
    $w .= int_to_words(floor($x/1000)) .' thousand';
    $r = fmod($x, 1000);
    if($r > 0) {
     $w .= ' ';
     if($r < 100)
       $w .= 'and ';
     $w .= int_to_words($r);
    }
  } else {  // millions
    $w .= int_to_words(floor($x/1000000)) .' million';
    $r = fmod($x, 1000000);
    if($r > 0) {
     $w .= ' ';
     if($r < 100)
       $word .= 'and ';
     $w .= int_to_words($r);
    }
  }
 }
 return $w;
}

?>