How to convert currency amount to uppercase in php

In computer programming, it is sometimes necessary to convert a numerical amount of currency into an uppercase text amount to facilitate financial and other business processing. In PHP programs, you can use ready-made functions to accomplish this task.

PHP's built-in function money_format() can convert numbers to currency format, but it does not support converting currency to uppercase Chinese characters. Therefore, you need to write your own function to implement this functionality.

The following is a PHP function that converts currency amounts to uppercase:

function num2chn($num){
    $chn_num_arr = array("零","壹","贰","叁","肆","伍","陆","柒","捌","玖");
    $chn_unit_arr = array("","拾","佰","仟","万","亿");
    $res = "";
    $num_str = strval($num);
    $len = strlen($num_str);
    $pos = 0;
    $flag = false;
    $stack = array();
    for($i=$len-1;$i>=0;$i--){
        $n = intval($num_str[$i]);
        $unit = $chn_unit_arr[$pos%6];
        if($n==0){
            if($flag){
                array_push($stack, $chn_num_arr[$n]);
                $flag = false;
            }
        } else{
            $res = $chn_num_arr[$n].$unit.$res;
            $flag = true;
        }
        if($pos%4==0){
            if($flag) array_push($stack,$chn_unit_arr[$pos%6]);
            $flag = false;
        }
        $pos++;
    }
    if(count($stack)==0) return $res;
    else return implode("",$stack).$res;
}

This function accepts a number as input and returns its corresponding uppercase Chinese string.

The basic idea of ​​this function is to separate the input numbers by bits, and then splice them into a new string according to the Chinese number expressions (tens, hundreds, thousands, ten thousand, billions, etc.). Specifically, we loop through each digit of the input number, calculate its unit in Chinese numerical expression (units, tens, hundreds, etc.), and then convert the number into uppercase in Chinese based on this unit Numeric characters. At the same time, some special situations need to be considered, such as the number 0, multiple adjacent 0s, etc.

The implementation of this function is relatively simple, but it requires a certain foundation of Chinese numerical expression. In practical applications, appropriate modifications can be made according to specific needs to achieve better results.

In short, the function of converting currency amounts to uppercase is very important for business processing such as finance. It is also very common to use PHP and other languages ​​to implement this function. I hope this article will be helpful to readers.

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