function numToWord($num)

{
$chiNum = array('零', '一', '二', '三', '四', '五', '六', '七', '八', '九');
$chiUni = array('','十', '百', '千', '萬','十', '百', '千', '億', '十', '百','千','萬','十', '百', '千');
$uniPro = array(4, 8);
$chiStr = '';

$num_str = (string)$num;

$count = strlen($num_str);
$last_flag = true; //上一個 是否為0
$zero_flag = true; //是否第一個
$temp_num = null; //臨時數字
$uni_index = 0;

$chiStr = '';//拼接結果
if ($count == 2) {//兩位數
$temp_num = $num_str[0];
$chiStr = $temp_num == 1 ? $chiUni[1] : $chiNum[$temp_num].$chiUni[1];
$temp_num = $num_str[1];
$chiStr .= $temp_num == 0 ? '' : $chiNum[$temp_num];
}else if($count > 2){
$index = 0;
for ($i=$count-1; $i >= 0 ; $i--) {
$temp_num = $num_str[$i];
if ($temp_num == 0) {
$uni_index = $index%15;
if ( in_array($uni_index, $uniPro)) {
$chiStr = $chiUni[$uni_index]. $chiStr;
$last_flag = true;
}else if (!$zero_flag && !$last_flag ) {
$chiStr = $chiNum[$temp_num]. $chiStr;
$last_flag = true;
}
}else{
$chiStr = $chiNum[$temp_num].$chiUni[$index%16] .$chiStr;

$zero_flag = false;
$last_flag = false;
}
$index ++;
}
}else{
$chiStr = $chiNum[$num_str[0]];
}
return $chiStr;
}

$num = 101001545;
echo numToWord($num);