Problems and solutions to Chinese garbled characters encountered in PHP programming

In the process of PHP programming, the problem of Chinese garbled characters is one of the challenges that programmers often face. Chinese garbled characters refer to the garbled characters that appear when Chinese characters are displayed on the page, causing users to have difficulty reading or the page display being abnormal. This article will discuss the problem of Chinese garbled characters encountered in PHP programming and provide solutions and specific code examples.

1. Reasons for the problem of Chinese garbled characters

1. Character encoding is not uniform: In PHP development, common character encodings include UTF-8, GBK, ISO-8859-1, etc. If the encoding settings are not uniform when processing characters in the program, it will easily lead to Chinese garbled characters.

2. Database character set setting error: If the character set setting of the database is inconsistent with the character encoding in the PHP program, it will also cause Chinese garbled characters.

3. File encoding problem: When editing a PHP file, if the file encoding saved by the editor is not UTF-8, it may also cause Chinese garbled characters.

2. Solution

1. Set the PHP file encoding to UTF-8: Add the following code at the beginning of the PHP file to ensure that the PHP file is saved in UTF-8 encoding.

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

2. Set the database character set: When connecting to the database, execute the following statement to set the database character set to UTF-8.

mysqli_set_charset($conn, 'utf8');

3. Use mb_convert_encoding for character encoding conversion: You can use the mb_convert_encoding function to convert characters from one encoding to another.

$string = '中文字符串';
$encoded_string = mb_convert_encoding($string, 'utf-8', 'gbk');
echo $encoded_string;

4. Check the page encoding settings: Make sure the correct character encoding is set in the HTML page header.

<meta charset="UTF-8">

5. Avoid mixing different encodings: Try to use UTF-8 encoding uniformly and avoid mixing different character encodings in the program.

3. Sample code

The following is a sample code to demonstrate how to solve the Chinese garbled problem in PHP programming:

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

$conn = mysqli_connect('localhost', 'username', 'password', 'database');
mysqli_set_charset($conn, 'utf8');

$sql = "SELECT * FROM users";
$result = mysqli_query($conn, $sql);

while ($row = mysqli_fetch_assoc($result)) {
    $name = mb_convert_encoding($row['name'], 'utf-8', 'gbk');
    echo '姓名：' . $name . '<br>';
}

mysqli_close($conn);
?>

In the above sample code, we first set The encoding of the PHP file is UTF-8, then connect to the database and set the database character set to UTF-8. In the query results, perform character encoding conversion on the name field to ensure that Chinese characters are displayed normally.

Through the above solutions and sample codes, we hope to help PHP developers better solve the problem of Chinese garbled characters and improve the readability and user experience of the program.

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