Detailed explanation of the reasons and solutions for garbled characters on PHP pages

During the PHP development process, sometimes garbled characters will appear on the web page, which is very unfriendly to developers and website users, because it will cause great trouble in viewing information, and Affect browsing performance. So, why do garbled codes appear? This article will address this issue and discuss solutions.

1. Incorrect encoding format

A common problem is that when using different encoding formats, garbled characters often appear on the web page. When a text uses one encoding format and the web page uses another encoding format, garbled characters will appear when the page is displayed. This is because the encoding format in the website browser cannot correctly parse the required encoding format, resulting in garbled characters.

Solution:
a. Switch the HTML document encoding method to UTF-8 or GBK.
b. Use the meta tag in the head tag to set the web page encoding, for example:

2. The php.ini file is incorrectly configured

In PHP, it may also be because the configuration file is incorrect, resulting in garbled web pages. This is because PHP uses UTF-8 encoding by default. If the PHP.ini file is not configured with UTF-8, the output data will be garbled. In this case, the PHP.ini file needs to be configured.

Solution:
a. Open the PHP.ini file, find the default_charset item, and set the subsequent value to the UTF-8 configuration, for example: default_charset = "UTF-8".
b. You can also use header information to set the encoding in the PHP program, for example: header('content-type:text/html;charset=utf-8');

3. Database encoding Incorrect format

If the database encoding format is incorrect, it will also cause garbled characters on the web page. This is because the data encoding format stored in the database is different from the encoding format called on the web page. Inconsistency will also lead to garbled code problems.

Solution:
a. Adjust the character set in the database to UTF-8 or GBK, for example: ALTER DATABASE db_name DEFAULT CHARACTER SET utf8;
b. Before querying the database data, When mysql connects to the database, set the encoding to UTF-8. For example: mysqli_set_charset($con,"utf8");

4. Improper selection of web fonts

Another situation is the garbled code problem caused by improper selection of web fonts, especially in a Chinese environment. If the font you choose on the web page does not support Chinese, garbled characters will be displayed when displayed. At this time, you need to change the font you are using. You can choose fonts that support Chinese such as Song, Hei, or New Song.

The above are the reasons and solutions for garbled characters on PHP pages. In the PHP development process, the above methods are skills that must be mastered. If you can quickly solve garbled code problems when they occur, it will be of great help to your development work.

The above is the detailed content of Detailed explanation of the reasons and solutions for garbled characters on PHP pages. For more information, please follow other related articles on the PHP Chinese website!