Why can't PHP string be Chinese? How to solve?

PHP is a very popular programming language and is widely used in web development, server-side programming, database programming, etc. It supports a variety of data types, such as strings, integers, floating point types, arrays, objects, etc. The string type is one that is often used in programming. However, when writing programs in PHP, you may encounter a situation where Chinese characters cannot be included in the string. This article will introduce why PHP strings cannot be Chinese and how to solve this problem.

Why PHP strings cannot be Chinese

To understand why PHP strings cannot be Chinese, you need to first understand the way computers store characters. Characters in computers are stored in binary form, and each character has a corresponding binary code. ASCII code table is the most widely used character encoding table for computers, which contains 128 characters, including English letters, numbers, punctuation marks, etc. However, since the ASCII code table only contains 128 characters, it cannot represent characters in other languages, such as Chinese, Japanese, Korean, etc.

In order to solve this problem, some extended character encoding tables have emerged, such as GB2312, GBK, UTF-8, etc. Among them, UTF-8 is a universal character encoding method that can represent almost all characters, including Chinese characters. However, in PHP, strings use ASCII encoding by default. If you want to use other encoding methods, you need to set them manually. Therefore, if Chinese characters are included in the string, encoding problems will occur, resulting in Chinese characters not being displayed properly.

How to solve the problem that PHP strings cannot be Chinese

First of all, you need to determine the encoding method used. If your website is in Chinese, it is recommended to use UTF-8 encoding. If you want to modify the encoding method, you can add the following code to the PHP file:

header('Content-Type:text/html;charset=utf-8');

In addition, when operating on strings, you need to pay attention to the encoding method. If you want to intercept, replace, splice, etc. strings, you need to use the corresponding functions, such as mb_substr, mb_str_replace, mb_strlen, etc. These functions are all extension functions in PHP. You need to make sure that the extension is turned on before using them. For example, if you want to use the mb_substr function, you need to add the following code to your PHP configuration file:

extension=php_mbstring.dll

In addition, there are some other tricks, such as using HTML entities in the output. For example, writing the Chinese character "test" as "test" can avoid encoding problems. However, this method is not very common and is generally only used in special circumstances.

Conclusion

It is a common problem that PHP strings cannot be in Chinese, and special attention needs to be paid when developing web pages. This article explains why this problem occurs and how to fix it. Hope it helps.

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