An effective method to solve the problem of Chinese garbled characters in the database read by PHP

An effective method to solve the problem of Chinese garbled characters in PHP reading database

With the continuous development of network technology, PHP, as a widely used server-side scripting language, is used by many Used by website developers. During the development process, it is often necessary to interact with the database. However, when reading Chinese data in the database, garbled characters sometimes occur, causing trouble to developers. This article will discuss how to solve the problem of Chinese garbled characters in PHP reading database, and provide effective solutions and specific code examples.

1. Cause analysis

The problem of garbled Chinese data in the database when reading it in PHP mainly has the following possible reasons:

1. Database character set Incorrect settings: Incorrect database character set settings will cause data to be encoded incorrectly when read into PHP, resulting in garbled characters.
2. The character set is not set when PHP connects to the database: PHP does not set the correct character set when connecting to the database, resulting in Chinese data being lost or encoding errors during transmission.
3. The character set settings of database tables and fields are inconsistent: The character set settings of tables and fields in the database are inconsistent, which may cause garbled data when reading.

2. Solution

In response to the above possible reasons, the following is an effective method to solve the problem of Chinese garbled characters in PHP reading the database:

1. Set up the database The character set is UTF-8

First, you need to ensure that the character set of the database is set to UTF-8. UTF-8 is a universal character encoding that supports characters in most languages. The character set of the database can be modified to UTF-8 through the following SQL statement:

ALTER DATABASE database_name DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

where database_name is the name of your database. After executing the above SQL statement, the data in the database will be stored in the UTF-8 character set.

2. Set the character set when PHP connects to the database

When PHP connects to the database, you need to set the correct character set to ensure the accuracy of data transmission. You can add the following statement to the code for connecting to the database to set the character set to UTF-8:

mysqli_set_charset($con, "utf8");

Among them, $con is the database connection variable. After connecting to the database, use the above code to set the character set to UTF-8. .

3. Set the character set of database tables and fields

Make sure that the character set settings of the tables and fields in the database are consistent with the database. You can modify the table and field through the following SQL statements. The character set of the field is UTF-8:

ALTER TABLE table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;

where table_name is your table name. After executing the above SQL statement, the character set of the data in the table will be set to UTF-8.

The above three points are effective ways to solve the problem of Chinese garbled characters in PHP reading the database. By correctly setting the database, the character set when PHP connects to the database, and the character set of database tables and fields, you can effectively avoid the problem of Chinese garbled characters. occur.

3. Code Example

The following provides a simple PHP code example to demonstrate how to connect to the database and read Chinese data to ensure that the Chinese data is displayed normally:

// 连接数据库
$con = mysqli_connect("localhost", "root", "password", "database");
if (!$con) {
    die("连接数据库失败: " . mysqli_connect_error());
}

// 设置字符集为UTF-8
mysqli_set_charset($con, "utf8");

// 查询数据库中的中文数据
$sql = "SELECT * FROM table";
$result = mysqli_query($con, $sql);

if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        echo $row['chinese_field'] . "
";
    }
} else {
    echo "没有中文数据";
}

// 关闭数据库连接
mysqli_close($con);

Above In the code example, first connect to the database and set the character set to UTF-8, then query the table in the database and obtain the value of the Chinese field for output. Finally, close the database connection to ensure the integrity and security of the code.

Summary

Through the introduction of this article, you should understand the effective methods to solve the problem of Chinese garbled characters in PHP reading the database, including setting the database character set, setting the character set when PHP connects to the database, and setting up the database. Character set for tables and fields. Through correct operations and code examples, you can avoid the occurrence of Chinese garbled characters and ensure that Chinese data is displayed normally in PHP. I hope the above content is helpful to you. Welcome to try and learn more about the relevant knowledge.

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