Why is php inserted into the database garbled?

The reasons why PHP inserts garbled characters into the database: 1. The database character set configuration is incorrect. Change the character set of the table database to be consistent with the character set used by the application; 2. The character encoding setting is incorrect when PHP connects to the database. , you can use the "mysqli_set_charset()" function to set the character encoding of the database connection; 3. The character encoding problem of the PHP file itself, ensure that the character encoding setting of the PHP file itself is correct; 4. The data submitted by the HTML form is incorrect; 5. Database field type Does not match the inserted data type, etc.

#The operating environment of this article: Windows 10 system, php8.1.3 version, dell g3 computer.

The problem of garbled characters when inserting into the database in PHP is usually related to the character encoding settings. The following are some possible causes and solutions for garbled characters:

1. Incorrect database character set configuration: First, ensure that the character set setting of the database table is consistent with the character set used by the application . You can change the character set of a table by executing the following SQL command: ALTER TABLE table_name CONVERT TO CHARACTER SET charset_name;

For example, to change the character set of the table named "users" to UTF-8, you You can use the following command:

ALTER TABLE users CONVERT TO CHARACTER SET utf8;

2. The character encoding setting is incorrect when PHP connects to the database: Before connecting to the database, you can use the mysqli_set_charset() function to set the character encoding of the database connection. For example, if you are using a MySQL database, you can add the following code to set the character encoding after connecting:

mysqli_set_charset($conn, "utf8");

3. The character encoding problem of the PHP file itself: Ensure that your PHP file itself The character encoding is set correctly. You can add the following code at the beginning of the file to set the character encoding:

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

4. The data submitted by the HTML form is incorrect: If your insertion is data submitted through the HTML form, make sure The form's encoding is set correctly. You can add the following attributes in the form tag to specify the encoding method of the form:

5. The database field type does not match the inserted data type: If your inserted data type does not match the database field type Mismatch may also lead to garbled characters. Make sure the inserted data corresponds to the database field type.

If you still encounter garbled characters, please ensure that your data itself is in the correct encoding, and try to save the data in the correct encoding format before inserting it. You can use PHP's built-in functions such as iconv or mb_convert_encoding to do the transcoding.

These solutions should help you solve the problem of PHP inserting garbled characters into the database. If you need further assistance, please provide more information about your specific situation, such as the source of the data, what type of database you are using, etc., so that we can provide a more precise solution.

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