Convert Arabic numerals to Chinese characters (upper and lower case)

To convert numbers into Chinese characters
I wrote one myself

function number2Chinese($num, $m = 1) {
 switch($m) {
 case 0:
 $CNum = array(
 array('zero','壹','二','三','四','五','鲁','旒','捌','玖'),
 array('','十','百','千'),
 array(' ','million','billion','trillion')
 );
 break;
 default:
 $CNum = array(
 array('zero','one','two','three',' four','five','six','seven','eight','nine'),
 array('','ten','hundred','thousand'),
 array('',' Wan','billion','trillion')
 );
 break;
 }

 // $cNum = array('zero','one','two','three','four',' five','six','seven','eight','nine');

 if (is_integer($num)) {
 $int = (string)$num;
 } else if (is_numeric($num )) {
 $num = explode('.', (string)floatval($num));
 $int = $num[0];
 $fl = isset($num[1]) ? $num[1 ] : FALSE;
 }

 // Length
 $len = strlen($int);

 // Chinese
 $chinese = array();

 // Reverse number
 $str = strrev($int );

 for($i = 0; $i<$len; $i+=4 ) {
 $s = array(0=>$str[$i], 1=>$str[$i+ 1 ], 2=>$str[$i+2], 3=>$str[$i+3]);

 $j = '';
 // Thousands digit
 if ($s[3 ] !== '') {
 $s[3] = (int) $s[3];
 if ($s[3] !== 0) {
 $j .= $CNum[0][$ s [3]].$CNum[1][3];
 } else {
 if ($s[2] != 0 || $s[1] != 0 || $s[0]!=0 ) {
 $j .= $CNum[0][0];
 }
 }
 }
 // Hundreds place
 if ($s[2] !== '') {
 $s[2] = ( int ) $s[2];
 if ($s[2] !== 0) {
 $j .= $CNum[0][$s[2]].$CNum[1][2];
 } else {
 if ($s[3]!=0 && ($s[1] != 0 || $s[0]!=0) ) {
 $j .= $CNum[0][0] ;
 }
 }
 }
 // Tens digit
 if ($s[1] !== '') {
 $s[1] = (int) $s[1];
 if ($s[1 ] !== 0) {
 $j .= $CNum[0][$s[1]].$CNum[1][1];
 } else {
 if ($s[0]!=0 && $ s[2] != 0) {
 $j .= $CNum[0][$s[1]];
 }
 }
 }
 // ones digit
 if ($s[0] !== ' ') {
 $s[0] = (int) $s[0];
 if ($s[0] !== 0) {
 $j .= $CNum[0][$s[0] ] .$CNum[1][0];
 } else {

 // $j .= $CNum[0][0];

 }
 }

 $j.=$CNum[2][$ i /4];
 array_unshift($chinese, $j);
 }

 $chs = implode('', $chinese);

 if ($fl) {
 $chs .= 'point';
 for ( $i=0,$j=strlen($fl); $i<$j; $i++) {
 $t = (int)$fl[$i];
 $chs.= $str[0][ $ t];
 }
 }

 return $chs;
}

function number2Chinese($num, $m = 1) {
 switch($m) {
 case 0:
 $CNum = array(
 array('zero','壹','二','三','四','五','鲁','旒','捌','玖'),
 array('','十','百','千'),
 array(' ','million','billion','trillion')
 );
 break;
 default:
 $CNum = array(
 array('zero','one','two','three',' four','five','six','seven','eight','nine'),
 array('','ten','hundred','thousand'),
 array('',' Wan','billion','trillion')
 );
 break;
 }

 // $cNum = array('zero','one','two','three','four',' five','six','seven','eight','nine');

 if (is_integer($num)) {
 $int = (string)$num;
 } else if (is_numeric($num )) {
 $num = explode('.', (string)floatval($num));
 $int = $num[0];
 $fl = isset($num[1]) ? $num[1 ] : FALSE;
 }

 // Length
 $len = strlen($int);

 // Chinese
 $chinese = array();

 // Reverse number
 $str = strrev($int );

 for($i = 0; $i<$len; $i+=4 ) {
 $s = array(0=>$str[$i], 1=>$str[$i+ 1 ], 2=>$str[$i+2], 3=>$str[$i+3]);

 $j = '';
 // Thousands digit
 if ($s[3 ] !== '') {
 $s[3] = (int) $s[3];
 if ($s[3] !== 0) {
 $j .= $CNum[0][$ s [3]].$CNum[1][3];
 } else {
 if ($s[2] != 0 || $s[1] != 0 || $s[0]!=0 ) {
 $j .= $CNum[0][0];
 }
 }
 }
 // Hundreds place
 if ($s[2] !== '') {
 $s[2] = ( int ) $s[2];
 if ($s[2] !== 0) {
 $j .= $CNum[0][$s[2]].$CNum[1][2];
 } else {
 if ($s[3]!=0 && ($s[1] != 0 || $s[0]!=0) ) {
 $j .= $CNum[0][0] ;
 }
 }
 }
 // Tens digit
 if ($s[1] !== '') {
 $s[1] = (int) $s[1];
 if ($s[1 ] !== 0) {
 $j .= $CNum[0][$s[1]].$CNum[1][1];
 } else {
 if ($s[0]!=0 && $ s[2] != 0) {
 $j .= $CNum[0][$s[1]];
 }
 }
 }
 // ones digit
 if ($s[0] !== ' ') {
 $s[0] = (int) $s[0];
 if ($s[0] !== 0) {
 $j .= $CNum[0][$s[0] ] .$CNum[1][0];
 } else {

 // $j .= $CNum[0][0];

 }
 }

 $j.=$CNum[2][$ i /4];
 array_unshift($chinese, $j);
 }

 $chs = implode('', $chinese);

 if ($fl) {
 $chs .= 'point';
 for ( $i=0,$j=strlen($fl); $i<$j; $i++) {
 $t = (int)$fl[$i];
 $chs.= $str[0][ $ t];
 }
 }

 return $chs;
}