php数字转汉字的函数算法

function del0($num) //去掉数字段前面的0

{

return "".intval($num);

}

function n2c($x) //单个数字变汉字

{

$arr_n = array("零","一","二","三","四","五","六","七","八","九","十");

return $arr_n[$x];

}

function num_r($abcd) //读取数值（4位）

{

$arr= array();

$str = ""; //读取后的汉字数值

$flag = 0; //该位是否为零

$flag_end = 1; //是否以"零"结尾

$size_r = strlen($abcd);

for($i=0; $i<$size_r; $i++)

{

$arr[$i] = $abcd{$i};

}

$arrlen = count($arr);

for($j=0; $j<$arrlen; $j++)

{

$ch = n2c($arr[$arrlen-1-$j]); //从后向前转汉字

//echo $ch;

//echo "<br>";

if($ch == "零" && $flag == 0){ //如果是第一个零

$flag = 1; //该位为零

$str = $ch.$str; //加入汉字数值字符串

continue;

}elseif($ch == "零"){ //如果不是第一个零了

continue;

}

$flag = 0; //该位不是零

switch($j) {

case 0: $str = $ch; $flag_end = 0; break; //第一位（末尾），没有以"零"结尾

case 1: $str = $ch."十".$str; break; //第二位

case 2: $str = $ch."百".$str; break; //第三位

case 3: $str = $ch."千".$str; break; //第四位

}

}

if($flag_end == 1) //如果以"零"结尾

{

mb_internal_encoding("UTF-8");

$str = mb_substr($str, 0, mb_strlen($str)-1); //把"零"去掉

}

if($arrlen == 2 && $arr[0] == 1){

$str = substr($str,2);

}

return $str;

}

function num2ch($num) //整体读取转换

{

$num_real = del0($num);//去掉前面的"0"

$numlen = strlen($num_real);

//echo "numlen=".$numlen."<br>";

if($numlen >= 9)//如果满九位，读取"亿"位

{

$y=substr($num_real, -9, 1);

//echo $y;

$wsbq = substr($num_real, -8, 4);

$gsbq = substr($num_real, -4);

$a = num_r(del0($gsbq));

$b = num_r(del0($wsbq))."万";

$c = num_r(del0($y))."亿";

}elseif($numlen <= 8 && $numlen >= 5) //如果大于等于"万"

{

$wsbq = substr($num_real, 0, $numlen-4);

$gsbq = substr($num_real, -4);

$a = num_r(del0($gsbq));

$b = num_r(del0($wsbq))."万";

$c="";

}elseif($numlen <= 4) //如果小于等于"千"

{

$gsbq = substr( $num_real, -$numlen);

$a = num_r(del0($gsbq));

$b="";

$c="";

}

$ch_num = $c.$b.$a;

return $ch_num;

}

/******************数字转汉字结束********************/