How to convert encoding to Chinese characters in php

With the continuous development of the Internet and the continuous expansion of e-commerce, online education, social entertainment and other fields, various programming languages ​​​​are gradually being widely used. As a development language that runs on the server side, PHP is widely used, especially in web development. However, when PHP processes Chinese characters, garbled characters often occur. This is also one of the problems that PHP developers often encounter. This article will introduce how to use PHP to convert encoding into Chinese characters to solve this problem.

1. What is coding

First of all, we need to understand what coding is. Simply put, encoding is a way of converting characters into numbers. Currently, the most common character encoding is Unicode, and the American National Standards Institute (ANSI) has also developed some encoding standards such as ASCII, ISO-8859, etc. In network transmission, in order to compress data, we encode characters. For example, UTF-8 is a commonly used encoding.

2. How to judge the encoding

Next, we need to master how to judge the encoding. In PHP, the encoding of a string can be automatically identified using the mb_detect_encoding() function. Call this function and pass in the string to be judged as the first parameter. The second parameter is an optional parameter and is used to specify the array of character sets. The third parameter indicates whether to use BOM (Byte Order Mark). The default is false. This function returns the encoding type of the string.

For example, the following code will output "UTF-8":

$charset = mb_detect_encoding($str, array('UTF-8', 'GBK', 'GB2312'));
echo $charset;

3. How to convert the encoding to Chinese characters

Once we determine the encoding type of the string, then The next step is how to convert the encoding into Chinese characters. Here we use the iconv() function in PHP. The iconv() function can convert strings encoded between different character sets and convert the encoding into Chinese characters.

For example, the following code will output "I am Chinese":

$str = iconv("UTF-8", "GB2312", "我是中国人");
echo $str;

In practical applications, we can solve the PHP garbled problem through the following process:

① Determine the characters The original encoding type of the string:

$charset = mb_detect_encoding($str, array('UTF-8', 'GBK', 'GB2312'));

② Convert to UTF-8 format:

if($charset != 'UTF-8'){
    $str = iconv($charset, 'UTF-8', $str);
}

③ Convert UTF-8 encoding to Chinese characters:

$str = iconv('UTF-8', 'GB2312', $str);

4. How to batch conversion Encoding

The above method is suitable for encoding conversion of a single string, but when we have to process a large number of strings, manual conversion will be very troublesome. At this time, we need to batch convert encodings. Here we use the array_map() function and anonymous function in PHP to achieve this.

For example, the following code will convert all strings in the $arr array from UTF-8 to GB2312:

$arr = array('张三', '李四', '王五');
$arr = array_map(function($string){
    $charset = mb_detect_encoding($string, array('UTF-8', 'GBK', 'GB2312'));
    if($charset != 'UTF-8'){
        $string = iconv($charset, 'UTF-8', $string);
    }
    $string = iconv('UTF-8', 'GB2312', $string);
    return $string;
}, $arr);
print_r($arr);

5. Summary

This article introduces how to use PHP Convert encoding to Chinese characters and solve the problem of PHP garbled characters. The general process is: determine the encoding type, convert to UTF-8 encoding, and convert UTF-8 encoding to Chinese characters. But in practical applications, we usually need to process strings in batches, and batch conversion encoding is very necessary. The above methods can help PHP developers easily solve coding conversion problems and improve coding quality and efficiency.

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