How to convert utf-8 file to gbk format using php

In PHP development, sometimes we need to convert UTF-8 encoded files to GBK encoded files. This situation generally occurs when GB2312 encoding is used in the project and UTF-8 encoded files need to be called. This article will introduce how to convert utf-8 files to gbk files through php.

First, let’s have some basic understanding of file encoding. In computers, characters are stored in digital form. English characters use ASCII code, and Chinese characters usually use GB code. With the development of the Internet, UTF-8 encoding has gradually become the de facto standard because it supports multiple languages, especially Chinese.

Next, we need to use a php function to convert the file encoding. This function is the iconv() function. The iconv() function is a built-in character encoding function in PHP, which can be used to implement encoding conversion from UTF-8 to GBK.

The following is a simple example to illustrate how to use the iconv() function to convert a UTF-8 file to a GBK file:

$file = 'utf-8-file.txt'; //UTF-8编码的文件
$content = file_get_contents($file); //读取文件内容
$content = iconv("UTF-8", "GBK//IGNORE", $content); //将文件内容转换为GBK编码
$file = 'gbk-file.txt'; //新文件名
file_put_contents($file, $content); //保存为新的GBK编码的文件

In the above code, we first define a UTF-8 encoded file, and then read the file contents through the file_get_contents() function. Next, use the iconv() function to convert the file content from UTF-8 encoding to GBK encoding, and then save the converted content as a new GBK encoded file.

It should be noted that the "IGNORE" parameter in the above code is optional. Its function is to skip characters that cannot be converted. If this parameter is not used, an error will occur during the conversion process.

In addition to the iconv() function, the mb_convert_encoding() function can also be used for character encoding conversion. Its usage is basically the same as the iconv() function, but it differs in some aspects.

$file = 'utf-8-file.txt'; //UTF-8编码的文件
$content = file_get_contents($file); //读取文件内容
$content = mb_convert_encoding($content, "GBK", "UTF-8"); //将文件内容转换为GBK编码
$file = 'gbk-file.txt'; //新文件名
file_put_contents($file, $content); //保存为新的GBK编码的文件

The second parameter of the mb_convert_encoding() function is the target encoding, and the third parameter is the source encoding. Through this function, we can quickly convert between different character sets.

In actual development, attention should be paid to ensuring that the encoding types of the source file and the target file are consistent. Otherwise, no matter which function is used for conversion, you will not get the correct result.

In general, converting UTF-8 files to GBK files through php is a very simple matter. As long as you master this basic conversion method, you can easily implement it in any project. File encoding conversion.

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