Why does php output Chinese characters as garbled characters? How to deal with it?

With the rapid development of the Internet, programming languages ​​have become more and more diverse, among which php is the most commonly used. However, many PHP beginners often encounter garbled characters when outputting Chinese.

So what is the reason for the problem of garbled php output?

First of all, we need to understand the concepts of "character set" and "encoding". A character set is composed of a set of characters, such as GBK, UTF-8, ISO-8859-1, etc. Encoding is the process of representing each character in a character set as a binary number. Common encoding methods include ASCII, GB2312, UTF-8, etc.

In php, we solve the problem of Chinese garbled characters by setting header information. The header information is responsible for telling the browser how to interpret the encoding of the page. The following is a simple php code:

header('Content-Type:text/html;charset=utf-8');
echo '你好，世界！';

By setting the Content-Type in the header information, the page encoding can be specified as utf-8. After executing the above code, you can see that the output Chinese characters are displayed normally.

If you forget to set the header information, you can also use PHP's built-in functions mb_internal_encoding() and mb_http_output() to set the encoding. For example:

mb_internal_encoding('utf-8');
mb_http_output('utf-8');
echo '你好，世界！';

In this code, the mb_internal_encoding() function is used to set the internal character set encoding to utf-8, and the mb_http_output() function is used to tell the browser to use utf-8 to parse the page. Normal Chinese output can also be achieved.

Due to the large Chinese character set, sometimes garbled characters are prone to occur when using other character sets. If you encounter other encoding problems, you can first determine the current encoding and character set, and try to use header information or the mb function to solve it.

To summarize: the garbled Chinese characters output by PHP can be solved by setting the header information or the mb function. By using these tools proficiently, you can avoid such problems.

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