How to convert Chinese characters to numbers in php

1. Background

In some specific scenarios, it is necessary to convert Chinese characters into numbers for processing. For example, some algorithms may require the addition, subtraction, multiplication, and division of Chinese character numbers, or when it comes to data storage, it may be necessary to convert Chinese character numbers into Arabic numerals for recording.

In the PHP language, a very convenient method of converting Chinese characters to numbers is provided. This article will introduce the implementation process of this method and its precautions.

2. Implementation steps

1. Get Chinese character numbers

Before converting Chinese characters to numbers, you need to obtain Chinese character numbers first. Chinese character numbers can be obtained by submitting a form, reading from the database, or directly through constant assignment. The specific implementation method can be selected according to specific scenarios.

For example:

$hzn = 'six thousand and sixty-two';

2. replace with the corresponding number

in getting After the Chinese characters, you need to replace them with the corresponding Arabic numerals. PHP provides a very easy-to-use function mb_convert_encoding() to achieve this replacement.

For example:

$hzn_ascii = mb_convert_encoding($hzn, 'GBK', 'UTF-8');

In the above code, we used mb_convert_encoding() The function converts UTF-8 encoded Chinese character numbers into GBK encoded ASCII numbers. In this way, we can replace ASCII numbers with Arabic numerals through the string replacement function str_replace().

For example:

$replace_array = array('zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven' , '八', '九');
$index_array = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
$hzn_ascii = str_replace($replace_array, $index_array, $hzn_ascii);

In the above code, we use two arrays: $replace_array and $index_array . These two arrays represent the correspondence between Chinese characters and Arabic numerals respectively. Use the str_replace() function to replace the Chinese characters in $hzn_ascii with the corresponding Arabic numerals.

3. Convert numbers to integers

After the replacement is completed, the resulting string is still of string type. When performing some mathematical operations, integer data is often needed. Therefore, the resulting numeric string needs to be converted into an integer.

For example:

$num = intval($hzn_ascii);

In the above code, we use the intval() function to convert characters from Chinese characters Convert string to integer.

3. Notes

In the process of converting Chinese characters to numbers, you need to pay attention to the following points:

1. Applicable to Simplified Chinese only

The method introduced in this article only applies to Simplified Chinese. If you need to process Traditional Chinese numbers, you need to write corresponding code separately.

2. Sequence of replacement

When replacing Chinese characters and numbers, you need to pay attention to the order of the corresponding relationship arrays $replace_array and $index_array. The order should be consistent, otherwise the conversion results will be incorrect.

3. Accurate input

When obtaining Chinese character numbers, you need to ensure the accuracy of the input. If the input string contains non-numeric characters, the replacement result will be incorrect.

4. Summary

In the PHP language, it is very convenient to convert Chinese character numbers into Arabic numerals. You only need to replace the Chinese character string with the corresponding ASCII string, then replace the ASCII string with the Arabic numeral string through the string replacement function, and finally convert the Arabic numeral string into an integer.

During the specific implementation process, attention needs to be paid to issues such as input accuracy and replacement order.

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