Master the skills of PHP processing Chinese character transcoding

PHP is a widely used server-side scripting language commonly used for website development. During website development, we often encounter the need to transcode Chinese characters, especially when dealing with Chinese characters. Mastering the skills of PHP in processing Chinese character transcoding can effectively avoid problems such as garbled characters and improve the stability and user experience of the website.

1. utf8_encode and utf8_decode functions

In PHP, you can use the utf8_encode and utf8_decode functions to encode and decode Chinese characters.

$chinese = "你好";
$encoded_chinese = utf8_encode($chinese);
echo $encoded_chinese; // 输出：浣犲ソ

$decoded_chinese = utf8_decode($encoded_chinese);
echo $decoded_chinese; // 输出：你好

The utf8_encode function can convert Chinese characters to UTF-8 encoding, and the utf8_decode function can convert UTF-8 encoded Chinese characters into original characters.

2. mb_convert_encoding function

Another commonly used function is mb_convert_encoding, which can be used to convert between different encodings, including UTF-8, GBK, etc.

$chinese = "你好";
$gbk_chinese = mb_convert_encoding($chinese, "GBK", "UTF-8");
echo $gbk_chinese; // 输出：浣犲ソ

$utf8_chinese = mb_convert_encoding($gbk_chinese, "UTF-8", "GBK");
echo $utf8_chinese; // 输出：你好

The above code converts the string "Hello" from UTF-8 encoding to GBK encoding, and then from GBK encoding back to UTF-8 encoding.

3. Use the iconv function

The iconv function is also a commonly used PHP function, used for conversion between different encodings.

$chinese = "你好";
$gbk_chinese = iconv("UTF-8", "GBK", $chinese);
echo $gbk_chinese; // 输出：浣犲ソ

$utf8_chinese = iconv("GBK", "UTF-8", $gbk_chinese);
echo $utf8_chinese; // 输出：你好

This code converts the "Hello" string from UTF-8 encoding to GBK encoding, and then from GBK encoding to UTF-8 encoding.

4. htmlspecialchars function

When you need to output Chinese characters in an HTML page, you can use the htmlspecialchars function to escape special characters to avoid XSS attacks.

$chinese = "你好";
echo htmlspecialchars($chinese); // 输出：你好

htmlspecialchars function can convert special characters into HTML entities so that they can be displayed normally when output to an HTML page.

To sum up, mastering the skills of PHP processing Chinese character transcoding is an essential part of website development. By using utf8_encode, utf8_decode, mb_convert_encoding, iconv and other functions, you can easily convert between different encodings to ensure that Chinese characters can be displayed correctly on the website. At the same time, using the htmlspecialchars function to escape the output content can effectively prevent XSS attacks. I hope the above code examples will be helpful to everyone in actual development.

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