What is the reason for Chinese garbled characters in php web pages? How to deal with it?

In web development, we often encounter the problem of garbled Chinese characters, and this problem most commonly occurs in PHP web pages. This article will briefly introduce the causes and solutions to the problem of Chinese garbled characters.

1. Reasons for garbled Chinese characters

The problem of garbled Chinese characters is mainly caused by inconsistent encoding methods. When writing a PHP program, you need to pay attention to the following aspects:

(1) Encoding issues of the PHP program file itself. When writing PHP code, you need to ensure that the program file is saved in UTF-8 encoding.

(2) Coding problem when PHP program connects to database. If the database uses UTF-8 encoding, you need to specify UTF-8 encoding when connecting, otherwise garbled characters will appear.

(3) Encoding problem when the PHP program itself outputs Chinese data. Before outputting Chinese, you need to ensure that the character set of the PHP program itself is UTF-8, otherwise the Chinese data cannot be output correctly.

2. Solution

(1) Save the PHP program file in UTF-8 encoding format. In the editor, you can save the PHP program file in UTF-8 encoding format by saving as. Or set the default encoding to UTF-8 through the editor settings.

(2) Set the database connection encoding to UTF-8. When the program connects to the database, you need to specify the database encoding method as UTF-8, as shown below:

$conn = mysqli_connect("localhost", "root", "", "test");
mysqli_set_charset($conn, "utf8");

(3) Set the PHP program output encoding to UTF-8. You can set the character set of the PHP program to UTF-8 in the following two ways:

Method one:

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

Method two:

ini_set('default_charset', 'utf-8');

After the setting is completed, in the program All Chinese data will be output in UTF-8 encoding, so there will no longer be the problem of Chinese garbled characters.

In addition, there are some other solutions, such as using iconv or mbstring extension library, etc., but compared with the above methods, these methods are really complex and impractical solutions.

Finally, it needs to be emphasized that when writing PHP programs, you need to maintain the consistency of the encoding method of input and output data at all times to avoid problems such as Chinese garbled characters.

Summary

Although the problem of Chinese garbled characters is common, it can be easily solved as long as you follow the consistency principle of the encoding method and set it up according to the above method.

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