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"); 
?>
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