How to solve Chinese garbled characters in PHP search

PHP is a popular server-side scripting language, and many websites are developed using PHP. Chinese garbled characters are a common problem when using PHP to develop search functions, especially when the input query string or data in the database contains Chinese characters.

The root cause of the Chinese garbled problem is that PHP uses ISO-8859-1 encoding by default to process strings, and in Chinese characters, each character needs to be represented by multiple bytes. Therefore, when PHP uses single-byte encoding to handle multi-byte characters, garbled characters will appear.

In order to solve the problem of Chinese garbled characters, we can use the following methods:

1. Set encoding

In PHP, we can set the encoding Solve the problem of Chinese garbled characters. Commonly used encodings include UTF-8, GBK, GB2312, etc. We can use the header function in PHP code to set the encoding format:

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

This code will tell The browser uses UTF-8 encoding to parse the page. When connecting to the database, you also need to set the encoding:

mysqli_set_charset($conn,"utf8");

When connecting to the database, we can use the mysqli_connect function to connect to the database and use mysqli_set_charset Function to set the database character set.

2. Use mb series functions

PHP provides a series of mb functions for processing multi-byte characters. These functions can avoid the problem of Chinese garbled characters. For example, we can use the mb_internal_encoding function to set PHP's internal encoding:

mb_internal_encoding("UTF-8");

We can also use the mb_strlen function to get the length of the string, so that Avoid errors when handling lengths.

3. Front-end processing

In addition to encoding processing on the back-end, we can also use the meta tag on the front-end to set the encoding format:

This code can be placed in the head tag of the HTML page to set the page encoding format.

Conclusion

Chinese garbled characters are a common problem, but we can solve this problem by setting the encoding, using mb series functions or front-end processing. When developing, we should pay special attention to handling Chinese characters to ensure the normal operation of the website.

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