一个阿拉伯数字转中文数字的函数

最近因需要，写了个“阿拉伯数字转中文数字的函数”。搜索了精华区只见到一个类似的。

感觉到我的算法不错，所以贴出来共享一下如果要用于金额的转换，对小数部分的处理要做一下修改

<?php

function ch_num($num,$mode=true) {

  $char = array("零","壹","贰","叁","肆","伍","陆","柒","捌","玖");

  $dw = array("","拾","佰","仟","","萬","億","兆");

  $dec = "點";

  $retval = "";

  if($mode)

    preg_match_all("/^0*(\d*)\.?(\d*)/",$num, $ar);

  else

    preg_match_all("/(\d*)\.?(\d*)/",$num, $ar);

  if($ar[2][0] != "")

    $retval = $dec . ch_num($ar[2][0],false); //如果有小数，先递归处理小数

  if($ar[1][0] != "") {

    $str = strrev($ar[1][0]);

    for($i=0;$i<strlen($str);$i++) {

      $out[$i] = $char[$str[$i]];

      if($mode) {

        $out[$i] .= $str[$i] != "0"? $dw[$i%4] : "";

        if($str[$i]+$str[$i-1] == 0)

          $out[$i] = "";

        if($i%4 == 0)

          $out[$i] .= $dw[4+floor($i/4)];

      }

    }

    $retval = join("",array_reverse($out)) . $retval;

  }

  return $retval;

}

//echo ch_num("12345006789001.123");

//echo ch_num("880079.1234");

echo ch_num("300045.0123");

?>