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
functionch_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;
}

//echoch_num("12345006789001.123");
//echoch_num("880079.1234");
echoch_num("300045.0123");

?>