PHP Chinese garbled solution

1. The first is the encoding of the PHP web page

1. The encoding of the PHP file itself and the encoding of the web page should match

a. If you want to use gb2312 encoding, then PHP should output the header: header("Content-Type: text/html;charset= gb2312"), add to the static page. The encoding format of all files is ANSI, which can be opened with Notepad and saved as the selected encoding. For ANSI, overwrite the source file.

b. If you want to use utf-8 encoding, then php should output the header: header("Content-Type: text/html;charset=utf-8"), and add , the encoding format of all files is utf-8. Saving as utf-8 may be a bit troublesome. Generally, utf-8 files will have BOM at the beginning. If you use session, there will be problems. You can use editplus to save. In editplus, go to Tools->Parameter Selection->File-> UTF-8 signature, select Always delete, then save to remove the BOM information.

2. PHP itself is not Unicode, all functions such as substr must be changed to mb_substr (mbstring extension needs to be installed); or iconv can be used to transcode.

2. Data interaction between PHP and Mysql

The encoding of PHP and the database should be consistent

1. Modify the mysql configuration file my.ini or my.cnf. It is best to use utf8 encoding for mysql

[mysql]
default-character-set=utf8
[mysqld]
default-character-set=utf8
default-storage-engine=MyISAM
Add under [mysqld]:
default-collation=utf8_bin
init_connect='SET NAMES utf8'

2. When you need to create a database Add mysql_query("set names'coding'"); before the operating PHP program. The encoding is consistent with the PHP encoding. If the PHP encoding is gb2312, then the mysql encoding is gb2312. If it is utf-8, then the mysql encoding is utf8. In this way, insert or retrieve There will be no garbled characters in the data

3. PHP is related to the operating system

The encoding of Windows and Linux is different. In the Windows environment, when calling PHP functions, if the parameters are utf-8 encoding, errors will occur, such as move_uploaded_file(), filesize(), readfile() etc. These functions are often used when processing uploads and downloads. The following error may occur when calling:

Warning: move_uploaded_file()[function.move-uploaded-file]: failed to open stream: Invalid argument in . ..

Warning: move_uploaded_file()[function.move-uploaded-file]:Unable to move '' to '' in ...

Warning: filesize() [function.filesize]: stat failed for ... in ...

Warning: readfile() [function.readfile]: failed to open stream: Invalid argument in ..

Although these errors will not occur when using gb2312 encoding in a Linux environment, the file name after saving will appear. The garbled code makes it impossible to read the file. In this case, you can first convert the parameters into the encoding recognized by the operating system. The encoding conversion can be done with mb_convert_encoding (string, new encoding, original encoding) or iconv (original encoding, new encoding, string). The file name saved later will not appear garbled, and the file can be read normally to achieve uploading and downloading of files with Chinese names.

In fact, there is a better solution, which is to completely separate from the system, so there is no need to consider the encoding of the system. You can generate a sequence of only letters and numbers as the file name, and save the original name with Chinese characters in the database. In this way, there will be no problem when calling move_uploaded_file(). When downloading, you only need to change the file name to the original name with Chinese characters. Chinese name. The code to implement downloading is as follows

header("Pragma: public");

header("Expires: 0");

header("Cache-Component: must-revalidate, post-check=0, pre-check= 0");

header("Content-type: $file_type");

header("Content-Length: $file_size");

header("Content-Disposition: attachment; filename="$file_name"" );

header("Content-Transfer-Encoding: binary");

readfile($file_path);

$file_type is the type of file, $file_name is the original name, $file_path is the file saved on the service address.

Four. Let