How to solve the problem that mysql displays garbled characters in php

Mysql displays garbled characters in PHP, which can be solved by setting the database character set, setting the PHP page character set, setting the character set of the MySQL database and table, and performing encoding conversion. Detailed introduction: 1. Set the database character set. By setting the character set, you can ensure that the data obtained from the database is displayed on the web page in the correct encoding; 2. Set the PHP page character set to ensure that the PHP page is output in UTF-8 encoding. To correctly display the data obtained from the database; 3. Set the character set of the MySQL database and table, etc.

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

MySQL is a popular relational database management system, and PHP is a commonly used server-side scripting language. When using PHP to connect to a MySQL database, you sometimes encounter the problem of garbled characters, which causes the data obtained from the database to be displayed as garbled characters on the web page. This article will introduce some methods to solve the problem of MySQL displaying garbled characters in PHP.

1. Set the database character set

Before connecting to the MySQL database, you can solve the problem of garbled characters by setting the database character set. After connecting to the database, you can use the following code to set the character set:

mysqli_set_charset($conn, "utf8");

Among them, $conn is the database connection object, and "utf8" means using the UTF-8 character set. By setting the character set, you can ensure that the data obtained from the database is displayed on the web page in the correct encoding.

2. Set the character set of the PHP page

In addition to setting the database character set, you can also set the character set in the PHP page. You can add the following code to the head of the PHP page:

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

This ensures that the PHP page is output in UTF-8 encoding, thereby correctly displaying the data obtained from the database.

3. Set the character set of the MySQL database and table

If the above two methods still cannot solve the garbled problem, you can try to set the character set of the MySQL database and table. You can specify the character set when creating the database, for example:

CREATE DATABASE mydatabase CHARACTER SET utf8 COLLATE utf8_general_ci;

where utf8 is the character set and utf8_general_ci is the collation. Similarly, you can also specify the character set when creating a table:

CREATE TABLE mytable (
...
) CHARACTER SET utf8 COLLATE utf8_general_ci;

By setting the character set of the database and table, you can ensure that the data stored in the database is saved in the correct encoding.

4. Convert encoding

If none of the above methods can solve the garbled problem, you can try to use PHP's built-in function to convert the encoding after getting the data from the database. You can use the following code:

$data = mb_convert_encoding($data, "UTF-8", "原编码");

Among them, $data is the data obtained from the database, "UTF-8" is the target encoding, and "original encoding" is the original encoding. By using the mb_convert_encoding function, the data can be converted from the original encoding to UTF-8 encoding so that it is displayed correctly on the web page.

Summary:

When displaying data in the MySQL database in PHP, garbled characters occur. You can set the database character set, set the PHP page character set, and set the MySQL database. and table character sets and encoding conversion to solve the problem. Choosing the appropriate method depends on the specific situation and can be tried based on actual needs. By solving the problem of garbled characters, you can ensure that the data obtained from the database is displayed on the web page in the correct encoding, improving the user experience. .

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