How to change numbers into uppercase letters in php

Converting numbers to uppercase letters is a function we often need to use in our work. Whether in financial statements, contracts, invoices and other documents, we need to express amounts or numbers in uppercase letters. In PHP, we can use simple code to convert numbers into uppercase letters. This article will introduce how to convert numbers into uppercase letters in PHP.

1. Use PHP built-in functions to convert numbers to uppercase letters

There is a built-in function in PHP that can convert numbers to uppercase letters, that is the number_format function. This function can specify how many decimal places to keep after the decimal point, you can also specify the thousands separator and decimal point separator, and you can also convert the numbers in the result to uppercase.

Here is the sample code to convert numbers to uppercase letters using the number_format function:

$number = 123.45; // 原始数字
$number = number_format($number, 2, '.', ''); // 转换为带 2 位小数的字符串
$numberArr = explode('.', $number); // 分割整数部分和小数部分
$integer = $numberArr[0]; // 整数部分
$fraction = $numberArr[1]; // 小数部分
$integerUpper = $this->getUpper($integer); // 整数部分转换为大写字母
$fractionUpper = $this->getUpper($fraction); // 小数部分转换为大写字母
echo $integerUpper . '点' . $fractionUpper . '元整'; // 输出转换后的结果

In the above code, we first use the number_format function Convert the number to a string with 2 decimal places, then use the explode function to separate the integer and decimal parts. Next, we call the custom getUpper function to convert the integer part and the decimal part into uppercase letters respectively. Finally, output the converted results.

The following is the code implementation of the getUpper function:

private function getUpper($number)
{
    if ($number == 0) {
        return '零';
    }
    $upper = '';
    $value = array(0 => '零', 1 => '壹', 2 => '贰', 3 => '叁', 4 => '肆', 5 => '伍', 6 => '陆', 7 => '柒', 8 => '捌', 9 => '玖');
    $unit = array('', '拾', '佰', '仟', '万', '亿');
    $number = strrev($number);
    for ($i=0; $i<count($number); $i++) {
        $upper .= $value[$number[$i]] . $unit[$i%5];
        if ($i%5 == 4) {
            $upper .= $unit[4];
        }
    }
    $upper = strrev(preg_replace(&#39;/零+/&#39;, &#39;零&#39;, $upper));
    if (substr($upper, 0, 3) == &#39;零&#39;) {
        $upper = substr($upper, 3);
    }
    return $upper;
}

In the above code, we define two arrays $value and $ unit, where the $value array represents the mapping relationship between numbers and uppercase letters, and the $unit array represents the corresponding relationship between digital bits and weights. Next, we reverse the characters converted from numbers, traverse each character, and convert the numbers into uppercase letters based on the correspondence between numbers and uppercase letters and the correspondence between digits and weights. Finally, use the preg_replace function to remove excess zeros, reverse the string back, and then remove the first excess zero to finally get the converted uppercase letters.

2. Use third-party tools to convert numbers to uppercase letters

In addition to PHP’s built-in functions, we can also use third-party tools to convert numbers to uppercase letters. Among the more excellent tools are thinkphp, phpopencloud, etc. These tools all provide the function of converting numbers into uppercase letters, and provide a variety of conversion methods and conversion formats that developers can choose to use according to their needs.

The following is a sample code that uses the thinkphp framework to convert numbers to uppercase letters:

use think\facade\Env;
require Env::get('app_path') . '/extend/chinese.php'; // 引入 thinkphp 框架中的数字大写转换类

$number = 123.45; // 原始数字
$upper = new \Chinese(); // 实例化数字大写转换类
$string = $upper->Number2chinese($number); // 转换为大写字母
echo $string; // 输出转换后的结果

In the above code, we first introduced the number to uppercase conversion class in the thinkphp framework, And instantiate an object of this class $upper. Next, use the object's Number2chinese method to convert the number to uppercase letters. Finally, just output the converted result.

3. Summary

Through the above analysis, we can see that there are many ways to change numbers to uppercase letters in PHP, whether using PHP built-in functions or third-party tools, you can easily accomplish. When choosing an implementation method, we need to make a choice based on specific needs and project characteristics. No matter which method is used to replace numbers with uppercase letters, during the coding process we should pay attention to the readability and maintainability of the code to ensure the quality and reliability of the code.

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