PHP函数操作数字和汉字互转（100以内）

function numDatabase(){
    $numarr =array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100);
    return $numarr;
}
function hzDatabase(){
    $hanziarr = array("一","二","三","四","五","六","七","八","九","十","十一","十二","十三","十四","十五","十六","十七","十八","十九","二十","二十一","二十二","二十三","二十四","二十五","二十六","二十七","二十八","二十九","三十","三十一","三十二","三十三","三十四","三十五","三十六","三十七","三十八","三十九","四十","四十一","四十二","四十三","四十四","四十五","四十六","四十七","四十八","四十九","五十","五十一","五十二","五十三","五十四","五十五","五十六","五十七","五十八","五十九","六十","六十一","六十二","六十三","六十四","六十五","六十六","六十七","六十八","六十九","七十","七十一","七十二","七十三","七十四","七十五","七十六","七十七","七十八","七十九","八十","八十一","八十二","八十三","八十四","八十五","八十六","八十七","八十八","八十九","九十","九十一","九十二","九十三","九十四","九十五","九十六","九十七","九十八","九十九","一百");
    return $hanziarr;
}

function num2hanzi($str){
    $numarr = numDatabase();
    $hanziarr = hzDatabase();
    preg_match('/[0-9]+/',$str,$t);
    $num = intval($t[0]);
    $rstr = '';
    if(in_array($num,$numarr)){
        foreach($numarr as $k=>$v){
            if($v==$num){
                $kk = $k;
            }
        }
        $rstr = str_replace($num,$hanziarr[$kk],$str);
    }
    return $rstr;
}
//汉字转数字
function hanzi2num($str){
    $numarr = numDatabase();
    $hanziarr = hzDatabase();
    foreach($hanziarr as $k=>$v){
        if(strpos($str,$v)!==false){
            $rstr = str_replace($v,$numarr[$k],$str);
        }
    }
    return $rstr;
}
function zhuan($str){
    $result = '';
    $n = array('0','1','2','3','4','5','6','7','8','9');
    $zi = array('一','二','三','四','五','六','七','八','九','十');
    foreach($zi as $k=>$v){
        if(strpos($str,$n[$k]) !== false){
            $result = num2hanzi($str);
        }
        if(strpos($str,$v) !== false){
            $result = hanzi2num($str);
        }
    }
    return $result;
}
// 应用举例
$str = '56';
$r = zhuan($str);
echo $r;	// 五十六

$str = "八十二";
$r = zhuan($str);
echo $r; 	// 82