An article discusses the reasons and solutions for garbled Chinese output in PHP

PHP is a widely used server-side scripting language that can run on a web server and be used in conjunction with HTML to create dynamic web pages. When using PHP, we often encounter the problem of garbled Chinese output, which troubles many developers. In this article, we will explore the reasons why php Chinese output is garbled and how to solve this problem.

1. Reasons for garbled Chinese output

1. Inconsistent character encoding
Character encoding refers to the process of mapping characters to numbers, which is the process of text processing in computers basic way. In Chinese text, the character encoding used is usually UTF-8, GB2312, GBK, etc. If the character encoding set in the page is inconsistent with the character encoding used in PHP, the Chinese output will be garbled.

2.The header is not set
In PHP, the header() function is used to set HTTP header information. If the header information is not set correctly, it will cause garbled Chinese characters. For example, if the Content-Type header information is not set before outputting Chinese, the Chinese output will be garbled.

3. The output cache is not cleared
There are two types of cache in PHP: output cache and file cache. If the output cache is not cleared before output, the Chinese output will be garbled.

2. Methods to solve Chinese output garbled characters

1. Set character encoding
Correctly setting character encoding is an important method to solve Chinese output garbled characters. Normally, the encoding format of the Php file should be consistent with the encoding format of the web page content. Generally, we need to use the following code at the top of the PHP file to set it:

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

2. Use the mb_convert_encoding function
PHP's mb_convert_encoding function can convert a string from one character encoding to another. For example, if the current character encoding is UTF-8, you can convert it to GB2312 format, as shown below:

$string = '你好，世界！';
$gbk_string = mb_convert_encoding($string, 'GBK', 'UTF-8');
echo $gbk_string;

3. Clear the output cache
Before doing Chinese output, you should clear the output cache, like this Other data will not be output together before output, resulting in garbled Chinese characters.

ob_clean(); // 清空缓存
echo '你好，世界！'; // 输出中文

Summary:

Chinese output garbled characters is a common problem in PHP development. We can avoid the problem of garbled Chinese output by setting the character encoding, using the mb_convert_encoding function, and clearing the output cache. These methods must be used in conjunction with the specific environment and actual needs to effectively solve the problem of garbled Chinese output.

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