The new version of php gbk background data is garbled

In PHP background development, we often encounter the problem of garbled characters in GBK encoding. Recently, PHP has launched a new version and introduced a new character encoding library. However, during use, data garbled problems still occur, which has a certain impact on backend development. This article will analyze the following aspects:

1. Causes of garbled characters
2. Character encoding of the new version of PHP
3. Methods to solve the problem of garbled data in the new version

1. Reasons for garbled codes

First of all, let’s talk about the reasons for garbled codes. Garbled characters are actually caused by character set mismatch. Under GBK encoding, some characters will occupy more bytes. If different character encoding libraries or different character sets are used, garbled characters will appear.

However, even under GBK encoding, there will be some special cases. For example, when your file uses special characters, such as Japanese or Korean, garbled characters may appear. In addition, when using the database, if the character set of the database is not set correctly, garbled characters will also be caused.

2. Character encoding of the new version of PHP

In the latest version of PHP, a new character encoding library has been introduced. This new encoding library features improved performance and wider character set support. It uses more advanced encoding technology that can better handle special characters in various character sets, thus avoiding some garbled characters that existed before.

For example, when using this new encoding library, if your file contains special characters such as Japanese and Korean, it can also be displayed correctly, thus avoiding the previous garbled code problem.

However, even if you use this new encoding library, you may still encounter some garbled characters. Because encoding problems often depend not only on the encoding library, but also on the code itself and the character set configuration of the database.

3. Methods to solve the problem of garbled data in the new version of PHP

With the solution, we can better deal with the problem of garbled data that may exist in the new version of PHP.

3.1. Set the file encoding

First, make sure that the encoding used by the PHP code you write matches the encoding of the file itself. For example, if your code uses GBK encoding, but the code file itself is UTF-8 encoded, then there will be a mismatch between the file and the code, leading to garbled code problems.

Therefore, you need to specify the correct encoding method in the file header:

header('Content-type:text/html;charset=GBK');

This way you can ensure that the code and file use the same encoding method.

3.2. Database character set setting

If your website involves the use of a database, it is also important to correctly set the database character set. When creating a database, you need to specify the correct character set to ensure that the data inserted into the database will not be displayed as garbled characters.

In php, you can set it like this:

$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'my_db');
$mysqli->set_charset('utf-8');

This way you can ensure that the character set used by the database is consistent with the character set used by the PHP code.

3.3. Use the mb_convert_encoding function to transcode

If you use the new version of PHP's encoding library and still cannot avoid the garbled code problem, you can consider using the mb_convert_encoding function to transcode.

This function is used to convert a string from one encoding to another encoding. For example, convert a UTF-8 encoded string into a GBK encoded string:

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

In this way, the UTF-8 string can be converted according to the GBK encoding method to avoid garbled characters. .

To sum up, the new version of PHP’s encoding library brings better performance and wider character set support, but garbled characters may still occur. Therefore, when performing background development, you need to pay attention to the consistency of code and file encoding, correctly set the character set of the database, and use the transcoding function to deal with garbled code problems encountered.

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