How to solve the garbled code in php

PHP is a widely used server-side scripting language, but sometimes garbled characters are encountered when processing Chinese characters. In this article, we will explore the root causes and possible solutions to the PHP garbled problem.

1. The root cause of garbled characters
1. Inconsistent encoding methods
The main reason for garbled characters is inconsistent encoding methods. Commonly used encoding methods in web development include ASCII, UTF-8 and GBK. If the PHP script uses a different encoding method than the HTML document, garbled characters will appear during output.

2. File encoding is different
If the encoding of the PHP file itself is inconsistent with the default encoding of the server, garbled characters will occur. Therefore, PHP files should be saved in the encoding format used by the server.

3. Different database encodings
When PHP interacts with the database, encoding inconsistencies may also occur. For example, if the database uses GBK encoding and PHP uses UTF-8 encoding, garbled characters will occur.

2. Solution
1. Ensure that the file encoding is consistent
In order to avoid garbled code problems caused by different file encodings, you should ensure that the encoding of the PHP file is consistent with the default encoding of the server during the development process. Normally, it is recommended to use UTF-8 encoding.

2. Make sure the database encoding is consistent
If the encoding of the database and PHP are inconsistent, you need to set the encoding when connecting to the database. For example, use the following statement when connecting to the MySQL database:

mysqli_set_charset($conn,'utf8');

This statement sets the encoding of the database to UTF-8 to ensure that when PHP interacts with the database Coding is consistent.

3. Use the header() function to set the encoding
If the output page appears garbled, you can use the header() function to set the page encoding:

header("Content-type:text/ html;charset=utf-8");

This statement sets the encoding of the output page to UTF-8. Statements in other encoding methods can be adjusted according to actual conditions.

4. Use the iconv() function for encoding conversion
If the input/output string encoding cannot be determined, you can use the iconv() function for encoding conversion.

For example, when outputting a GBK-encoded string to UTF-8 encoding, you can use the following code to convert:

$utf8_str = iconv("GBK", "UTF-8" , $gbk_str);

By calling the iconv() function, the GB2312 string can be converted into a UTF-8 string, avoiding garbled characters during output.

Conclusion
In Web development, solving the problem of garbled Chinese characters in PHP is a basic skill that every developer must master. By correctly setting the encoding method, file encoding and database encoding, and using the header() function and iconv() function to implement encoding conversion, most garbled code problems can be solved. During the actual development process, you need to pay attention to coding issues to ensure the functionality and user experience of the web application.

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