How to solve the garbled problem of php database

Solution to the garbled problem of PHP database: 1. Set the encoding utf8 in the head of the web page file; 2. Use utf8 encoding when saving the PHP page; 3. Select UTF8 encoding when creating a new database; 4. Just set the character set through "mysql_query("set names 'utf8' ");".

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

How to solve the garbled problem of php database?

Garbled code problem 1: When using PHPmyAdmin to operate the MySQL database, the Chinese characters are displayed normally, but when using the PHP web page to display the MySQL data, all Chinese characters become ? symbols.

Symptoms: It is normal to input Chinese characters using PHPmyAdmin, but when the PHP web page displays MySQL data, the Chinese characters become ? signs, and there are as many ? signs as there are Chinese characters.

Reason: There is no code in the PHP web page to tell MySQL what character set to use to output Chinese characters.

Solution:

1. Web page file head setting encoding

2. The PHP page is saved using utf-8 encoding when saving. You can use Notepad or convertz802 to convert the file

3. When creating a new database in MYSQL The database selects UTF-8 encoding and the character set is set to utf-8_unicode_ci (Unicode (multi-language), case-insensitive).

The table arrangement in the library is set to utf-8_general_ci

The arrangement of each field in the table is set to utf-8_general_ci

4. When PHP connects to the database, that is, add

//设置数据的字符集utf-8
mysql_query("set names 'utf8' ");
mysql_query("set character_set_client=utf8");
mysql_query("set character_set_results=utf8");

after mysql_connect(). Note that it is utf8, not utf -8 .

If your web page encoding is gb2312, that is SET NAMES GB2312. However, the editor strongly recommends that web page encoding, MySQL data table character set, and PHPmyAdmin all use UTF-8.

The above four points can achieve utf-8 encoding for the entire site, and there will be no Chinese garbled characters in the database.

Garbled characters problem 2: An error occurred when entering data with PHPmyAdmin, input is not allowed or garbled characters appear

Solution: This is a setting problem. Please install the latest version of PHPmyAdmin or Appserv, open PHPmyAdmin, MySQL character set: UTF-8 Unicode (utf8); MySQL connection proofreading should be utf8_unicode_ci; when creating a new database, please also select utf8_unicode_ci in the finishing column. It is also best to use UTF-8 as the web page character set. UTF-8 is an international standard encoding and a trend.

Garbled code problem 3: The MySQL data table developed on this machine is normal when tested on this machine. However, when uploading using PHPmyAdmin provided by the website space provider, a problem occurs and the upload fails. Especially using foreign PHP space.

Solution: First check the PHPmyAdmin character set settings provided by the website space provider, and make sure that the data table you build has the same encoding as that of the service provider. MySQL does not support gb2312 abroad, and even the latest version of Apache does not support gb2312. If it is because the encoding is not uniform, you can rebuild the data table, of course using the international standard UTF8.

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